/*!
 * Piwik - Web Analytics
 *
 * JavaScript tracking client
 *
 * @link http://piwik.org
 * @source https://github.com/piwik/piwik/blob/master/js/piwik.js
 * @license http://piwik.org/free-software/bsd/ Simplified BSD (also in js/LICENSE.txt)
 */

// Refer to README.md for build instructions when minifying this file for distribution.

/*
 * Browser [In]Compatibility
 * - minimum required ECMAScript: ECMA-262, edition 3
 *
 * Incompatible with these (and earlier) versions of:
 * - IE4 - try..catch and for..in introduced in IE5
 * - IE5 - named anonymous functions, array.push, encodeURIComponent, decodeURIComponent, and getElementsByTagName introduced in IE5.5
 * - Firefox 1.0 and Netscape 8.x - FF1.5 adds array.indexOf, among other things
 * - Mozilla 1.7 and Netscape 6.x-7.x
 * - Netscape 4.8
 * - Opera 6 - Error object (and Presto) introduced in Opera 7
 * - Opera 7
 */

/************************************************************
 * JSON - public domain reference implementation by Douglas Crockford
 * @version 2012-10-08
 * @link http://www.JSON.org/js.html
 ************************************************************/
/*jslint evil: true, regexp: false, bitwise: true*/
/*global JSON2:true */
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", "\\", apply,
    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
    lastIndex, length, parse, prototype, push, replace, sort, slice, stringify,
    test, toJSON, toString, valueOf,
    objectToJSON
*/

// Create a JSON object only if one does not already exist. We create the
// methods in a closure to avoid creating global variables.

if (typeof JSON2 !== 'object') {
    JSON2 = {};
}

(function () {
    'use strict';

    function f(n) {
        // Format integers to have at least two digits.
        return n < 10 ? '0' + n : n;
    }

    function objectToJSON(value, key) {
        var objectType = Object.prototype.toString.apply(value);

        if (objectType === '[object Date]') {
            return isFinite(value.valueOf())
                ?  value.getUTCFullYear()     + '-' +
                    f(value.getUTCMonth() + 1) + '-' +
                    f(value.getUTCDate())      + 'T' +
                    f(value.getUTCHours())     + ':' +
                    f(value.getUTCMinutes())   + ':' +
                    f(value.getUTCSeconds())   + 'Z'
                : null;
        }

        if (objectType === '[object String]' ||
                objectType === '[object Number]' ||
                objectType === '[object Boolean]') {
            return value.valueOf();
        }

        if (objectType !== '[object Array]' &&
                typeof value.toJSON === 'function') {
            return value.toJSON(key);
        }

        return value;
    }

    var cx = new RegExp('[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]', 'g'),
    // hack: workaround Snort false positive (sid 8443)
        pattern = '\\\\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]',
        escapable = new RegExp('[' + pattern, 'g'),
        gap,
        indent,
        meta = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        },
        rep;

    function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

        escapable.lastIndex = 0;

        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
            var c = meta[a];

            return typeof c === 'string'
                ? c
                : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
        }) + '"' : '"' + string + '"';
    }

    function str(key, holder) {

// Produce a string from holder[key].

        var i,          // The loop counter.
            k,          // The member key.
            v,          // The member value.
            length,
            mind = gap,
            partial,
            value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

        if (value && typeof value === 'object') {
            value = objectToJSON(value, key);
        }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

        if (typeof rep === 'function') {
            value = rep.call(holder, key, value);
        }

// What happens next depends on the value's type.

        switch (typeof value) {
        case 'string':
            return quote(value);

        case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

            return isFinite(value) ? String(value) : 'null';

        case 'boolean':
        case 'null':

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.

            return String(value);

// If the type is 'object', we might be dealing with an object or an array or
// null.

        case 'object':

// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.

            if (!value) {
                return 'null';
            }

// Make an array to hold the partial results of stringifying this object value.

            gap += indent;
            partial = [];

// Is the value an array?

            if (Object.prototype.toString.apply(value) === '[object Array]') {

// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                length = value.length;
                for (i = 0; i < length; i += 1) {
                    partial[i] = str(i, value) || 'null';
                }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

                v = partial.length === 0
                    ? '[]'
                    : gap
                    ?  '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
                    : '[' + partial.join(',') + ']';
                gap = mind;

                return v;
            }

// If the replacer is an array, use it to select the members to be stringified.

            if (rep && typeof rep === 'object') {
                length = rep.length;
                for (i = 0; i < length; i += 1) {
                    if (typeof rep[i] === 'string') {
                        k = rep[i];
                        v = str(k, value);

                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }
            } else {

// Otherwise, iterate through all of the keys in the object.

                for (k in value) {
                    if (Object.prototype.hasOwnProperty.call(value, k)) {
                        v = str(k, value);

                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }
            }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

            v = partial.length === 0
                ? '{}'
                : gap
                ?  '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
                : '{' + partial.join(',') + '}';
            gap = mind;

            return v;
        }
    }

// If the JSON object does not yet have a stringify method, give it one.

    if (typeof JSON2.stringify !== 'function') {
        JSON2.stringify = function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

            var i;
            gap = '';
            indent = '';

// If the space parameter is a number, make an indent string containing that
// many spaces.

            if (typeof space === 'number') {
                for (i = 0; i < space; i += 1) {
                    indent += ' ';
                }

// If the space parameter is a string, it will be used as the indent string.

            } else if (typeof space === 'string') {
                indent = space;
            }

// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.

            rep = replacer;

            if (replacer && typeof replacer !== 'function' &&
                    (typeof replacer !== 'object' ||
                    typeof replacer.length !== 'number')) {
                throw new Error('JSON2.stringify');
            }

// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.

            return str('', {'': value});
        };
    }

// If the JSON object does not yet have a parse method, give it one.

    if (typeof JSON2.parse !== 'function') {
        JSON2.parse = function (text, reviver) {

// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.

            var j;

            function walk(holder, key) {

// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.

                var k, v, value = holder[key];

                if (value && typeof value === 'object') {
                    for (k in value) {
                        if (Object.prototype.hasOwnProperty.call(value, k)) {
                            v = walk(value, k);

                            if (v !== undefined) {
                                value[k] = v;
                            } else {
                                delete value[k];
                            }
                        }
                    }
                }

                return reviver.call(holder, key, value);
            }

// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.

            text = String(text);
            cx.lastIndex = 0;

            if (cx.test(text)) {
                text = text.replace(cx, function (a) {
                    return '\\u' +
                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
                });
            }

// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.

// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

            if ((new RegExp('^[\\],:{}\\s]*$'))
                    .test(text.replace(new RegExp('\\\\(?:["\\\\/bfnrt]|u[0-9a-fA-F]{4})', 'g'), '@')
                        .replace(new RegExp('"[^"\\\\\n\r]*"|true|false|null|-?\\d+(?:\\.\\d*)?(?:[eE][+\\-]?\\d+)?', 'g'), ']')
                        .replace(new RegExp('(?:^|:|,)(?:\\s*\\[)+', 'g'), ''))) {

// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.

                j = eval('(' + text + ')');

// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.

                return typeof reviver === 'function'
                    ?  walk({'': j}, '')
                    : j;
            }

// If the text is not JSON parseable, then a SyntaxError is thrown.

            throw new SyntaxError('JSON2.parse');
        };
    }
}());
/************************************************************
 * end JSON
 ************************************************************/

/*jslint browser:true, plusplus:true, vars:true, nomen:true, evil:true */
/*global window */
/*global unescape */
/*global ActiveXObject */
/*members encodeURIComponent, decodeURIComponent, getElementsByTagName,
    shift, unshift,
    createElement, appendChild, characterSet, charset,
    addEventListener, attachEvent, removeEventListener, detachEvent, disableCookies,
    cookie, domain, readyState, documentElement, doScroll, title, text,
    location, top, document, referrer, parent, links, href, protocol, name, GearsFactory,
    performance, mozPerformance, msPerformance, webkitPerformance, timing, requestStart,
    responseEnd, event, which, button, srcElement, type, target,
    parentNode, tagName, hostname, className,
    userAgent, cookieEnabled, platform, mimeTypes, enabledPlugin, javaEnabled,
    XMLHttpRequest, ActiveXObject, open, setRequestHeader, onreadystatechange, send, readyState, status,
    getTime, getTimeAlias, setTime, toGMTString, getHours, getMinutes, getSeconds,
    toLowerCase, toUpperCase, charAt, indexOf, lastIndexOf, split, slice,
    onload, src,
    round, random,
    exec,
    res, width, height, devicePixelRatio,
    pdf, qt, realp, wma, dir, fla, java, gears, ag,
    hook, getHook, getVisitorId, getVisitorInfo, setTrackerUrl, appendToTrackingUrl, setSiteId,
    getAttributionInfo, getAttributionCampaignName, getAttributionCampaignKeyword,
    getAttributionReferrerTimestamp, getAttributionReferrerUrl,
    setCustomData, getCustomData,
    setCustomVariable, getCustomVariable, deleteCustomVariable,
    setDownloadExtensions, addDownloadExtensions,
    setDomains, setIgnoreClasses, setRequestMethod,
    setReferrerUrl, setCustomUrl, setAPIUrl, setDocumentTitle,
    setDownloadClasses, setLinkClasses,
    setCampaignNameKey, setCampaignKeywordKey,
    discardHashTag,
    setCookieNamePrefix, setCookieDomain, setCookiePath, setVisitorIdCookie,
    setVisitorCookieTimeout, setSessionCookieTimeout, setReferralCookieTimeout,
    setConversionAttributionFirstReferrer,
    disablePerformanceTracking, setGenerationTimeMs,
    doNotTrack, setDoNotTrack, msDoNotTrack,
    addListener, enableLinkTracking, setLinkTrackingTimer,
    setHeartBeatTimer, killFrame, redirectFile, setCountPreRendered,
    trackGoal, trackLink, trackPageView, trackSiteSearch, trackEvent,
    setEcommerceView, addEcommerceItem, trackEcommerceOrder, trackEcommerceCartUpdate,
    deleteCookies
 */
/*global _paq:true */
/*members push */
/*global Piwik:true */
/*members addPlugin, getTracker, getAsyncTracker */
/*global Piwik_Overlay_Client */
/*members initialize */
/*global define */
/*members amd */

// asynchronous tracker (or proxy)
if (typeof _paq !== 'object') {
    _paq = [];
}

// Piwik singleton and namespace
if (typeof Piwik !== 'object') {
    Piwik = (function () {
        'use strict';

        /************************************************************
         * Private data
         ************************************************************/

        var expireDateTime,

            /* plugins */
            plugins = {},

            /* alias frequently used globals for added minification */
            documentAlias = document,
            navigatorAlias = navigator,
            screenAlias = screen,
            windowAlias = window,

            /* performance timing */
            performanceAlias = windowAlias.performance || windowAlias.mozPerformance || windowAlias.msPerformance || windowAlias.webkitPerformance,

            /* DOM Ready */
            hasLoaded = false,
            registeredOnLoadHandlers = [],

            /* encode */
            encodeWrapper = windowAlias.encodeURIComponent,

            /* decode */
            decodeWrapper = windowAlias.decodeURIComponent,

            /* urldecode */
            urldecode = unescape,

            /* asynchronous tracker */
            asyncTracker,

            /* iterator */
            iterator,

            /* local Piwik */
            Piwik;

        /************************************************************
         * Private methods
         ************************************************************/

        /*
         * Is property defined?
         */
        function isDefined(property) {
            // workaround https://github.com/douglascrockford/JSLint/commit/24f63ada2f9d7ad65afc90e6d949f631935c2480
            var propertyType = typeof property;

            return propertyType !== 'undefined';
        }

        /*
         * Is property a function?
         */
        function isFunction(property) {
            return typeof property === 'function';
        }

        /*
         * Is property an object?
         *
         * @return bool Returns true if property is null, an Object, or subclass of Object (i.e., an instanceof String, Date, etc.)
         */
        function isObject(property) {
            return typeof property === 'object';
        }

        /*
         * Is property a string?
         */
        function isString(property) {
            return typeof property === 'string' || property instanceof String;
        }

        /*
         * apply wrapper
         *
         * @param array parameterArray An array comprising either:
         *      [ 'methodName', optional_parameters ]
         * or:
         *      [ functionObject, optional_parameters ]
         */
        function apply() {
            var i, f, parameterArray;

            for (i = 0; i < arguments.length; i += 1) {
                parameterArray = arguments[i];
                f = parameterArray.shift();

                if (isString(f)) {
                    asyncTracker[f].apply(asyncTracker, parameterArray);
                } else {
                    f.apply(asyncTracker, parameterArray);
                }
            }
        }

        /*
         * Cross-browser helper function to add event handler
         */
        function addEventListener(element, eventType, eventHandler, useCapture) {
            if (element.addEventListener) {
                element.addEventListener(eventType, eventHandler, useCapture);

                return true;
            }

            if (element.attachEvent) {
                return element.attachEvent('on' + eventType, eventHandler);
            }

            element['on' + eventType] = eventHandler;
        }

        /*
         * Call plugin hook methods
         */
        function executePluginMethod(methodName, callback) {
            var result = '',
                i,
                pluginMethod;

            for (i in plugins) {
                if (Object.prototype.hasOwnProperty.call(plugins, i)) {
                    pluginMethod = plugins[i][methodName];

                    if (isFunction(pluginMethod)) {
                        result += pluginMethod(callback);
                    }
                }
            }

            return result;
        }

        /*
         * Handle beforeunload event
         *
         * Subject to Safari's "Runaway JavaScript Timer" and
         * Chrome V8 extension that terminates JS that exhibits
         * "slow unload", i.e., calling getTime() > 1000 times
         */
        function beforeUnloadHandler() {
            var now;

            executePluginMethod('unload');

            /*
             * Delay/pause (blocks UI)
             */
            if (expireDateTime) {
                // the things we do for backwards compatibility...
                // in ECMA-262 5th ed., we could simply use:
                //     while (Date.now() < expireDateTime) { }
                do {
                    now = new Date();
                } while (now.getTimeAlias() < expireDateTime);
            }
        }

        /*
         * Handler for onload event
         */
        function loadHandler() {
            var i;

            if (!hasLoaded) {
                hasLoaded = true;
                executePluginMethod('load');
                for (i = 0; i < registeredOnLoadHandlers.length; i++) {
                    registeredOnLoadHandlers[i]();
                }
            }

            return true;
        }

        /*
         * Add onload or DOM ready handler
         */
        function addReadyListener() {
            var _timer;

            if (documentAlias.addEventListener) {
                addEventListener(documentAlias, 'DOMContentLoaded', function ready() {
                    documentAlias.removeEventListener('DOMContentLoaded', ready, false);
                    loadHandler();
                });
            } else if (documentAlias.attachEvent) {
                documentAlias.attachEvent('onreadystatechange', function ready() {
                    if (documentAlias.readyState === 'complete') {
                        documentAlias.detachEvent('onreadystatechange', ready);
                        loadHandler();
                    }
                });

                if (documentAlias.documentElement.doScroll && windowAlias === windowAlias.top) {
                    (function ready() {
                        if (!hasLoaded) {
                            try {
                                documentAlias.documentElement.doScroll('left');
                            } catch (error) {
                                setTimeout(ready, 0);

                                return;
                            }
                            loadHandler();
                        }
                    }());
                }
            }

            // sniff for older WebKit versions
            if ((new RegExp('WebKit')).test(navigatorAlias.userAgent)) {
                _timer = setInterval(function () {
                    if (hasLoaded || /loaded|complete/.test(documentAlias.readyState)) {
                        clearInterval(_timer);
                        loadHandler();
                    }
                }, 10);
            }

            // fallback
            addEventListener(windowAlias, 'load', loadHandler, false);
        }

        /*
         * Load JavaScript file (asynchronously)
         */
        function loadScript(src, onLoad) {
            var script = documentAlias.createElement('script');

            script.type = 'text/javascript';
            script.src = src;

            if (script.readyState) {
                script.onreadystatechange = function () {
                    var state = this.readyState;

                    if (state === 'loaded' || state === 'complete') {
                        script.onreadystatechange = null;
                        onLoad();
                    }
                };
            } else {
                script.onload = onLoad;
            }

            documentAlias.getElementsByTagName('head')[0].appendChild(script);
        }

        /*
         * Get page referrer
         */
        function getReferrer() {
            var referrer = '';

            try {
                referrer = windowAlias.top.document.referrer;
            } catch (e) {
                if (windowAlias.parent) {
                    try {
                        referrer = windowAlias.parent.document.referrer;
                    } catch (e2) {
                        referrer = '';
                    }
                }
            }

            if (referrer === '') {
                referrer = documentAlias.referrer;
            }

            return referrer;
        }

        /*
         * Extract scheme/protocol from URL
         */
        function getProtocolScheme(url) {
            var e = new RegExp('^([a-z]+):'),
                matches = e.exec(url);

            return matches ? matches[1] : null;
        }

        /*
         * Extract hostname from URL
         */
        function getHostName(url) {
            // scheme : // [username [: password] @] hostame [: port] [/ [path] [? query] [# fragment]]
            var e = new RegExp('^(?:(?:https?|ftp):)/*(?:[^@]+@)?([^:/#]+)'),
                matches = e.exec(url);

            return matches ? matches[1] : url;
        }

        /*
         * Extract parameter from URL
         */
        function getParameter(url, name) {
            var regexSearch = "[\\?&#]" + name + "=([^&#]*)";
            var regex = new RegExp(regexSearch);
            var results = regex.exec(url);
            return results ? decodeWrapper(results[1]) : '';
        }

        /*
         * UTF-8 encoding
         */
        function utf8_encode(argString) {
            return urldecode(encodeWrapper(argString));
        }

        /************************************************************
         * sha1
         * - based on sha1 from http://phpjs.org/functions/sha1:512 (MIT / GPL v2)
         ************************************************************/

        function sha1(str) {
            // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
            // + namespaced by: Michael White (http://getsprink.com)
            // +      input by: Brett Zamir (http://brett-zamir.me)
            // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
            // +   jslinted by: Anthon Pang (http://piwik.org)

            var
                rotate_left = function (n, s) {
                    return (n << s) | (n >>> (32 - s));
                },

                cvt_hex = function (val) {
                    var strout = '',
                        i,
                        v;

                    for (i = 7; i >= 0; i--) {
                        v = (val >>> (i * 4)) & 0x0f;
                        strout += v.toString(16);
                    }

                    return strout;
                },

                blockstart,
                i,
                j,
                W = [],
                H0 = 0x67452301,
                H1 = 0xEFCDAB89,
                H2 = 0x98BADCFE,
                H3 = 0x10325476,
                H4 = 0xC3D2E1F0,
                A,
                B,
                C,
                D,
                E,
                temp,
                str_len,
                word_array = [];

            str = utf8_encode(str);
            str_len = str.length;

            for (i = 0; i < str_len - 3; i += 4) {
                j = str.charCodeAt(i) << 24 | str.charCodeAt(i + 1) << 16 |
                    str.charCodeAt(i + 2) << 8 | str.charCodeAt(i + 3);
                word_array.push(j);
            }

            switch (str_len & 3) {
            case 0:
                i = 0x080000000;
                break;
            case 1:
                i = str.charCodeAt(str_len - 1) << 24 | 0x0800000;
                break;
            case 2:
                i = str.charCodeAt(str_len - 2) << 24 | str.charCodeAt(str_len - 1) << 16 | 0x08000;
                break;
            case 3:
                i = str.charCodeAt(str_len - 3) << 24 | str.charCodeAt(str_len - 2) << 16 | str.charCodeAt(str_len - 1) << 8 | 0x80;
                break;
            }

            word_array.push(i);

            while ((word_array.length & 15) !== 14) {
                word_array.push(0);
            }

            word_array.push(str_len >>> 29);
            word_array.push((str_len << 3) & 0x0ffffffff);

            for (blockstart = 0; blockstart < word_array.length; blockstart += 16) {
                for (i = 0; i < 16; i++) {
                    W[i] = word_array[blockstart + i];
                }

                for (i = 16; i <= 79; i++) {
                    W[i] = rotate_left(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16], 1);
                }

                A = H0;
                B = H1;
                C = H2;
                D = H3;
                E = H4;

                for (i = 0; i <= 19; i++) {
                    temp = (rotate_left(A, 5) + ((B & C) | (~B & D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
                    E = D;
                    D = C;
                    C = rotate_left(B, 30);
                    B = A;
                    A = temp;
                }

                for (i = 20; i <= 39; i++) {
                    temp = (rotate_left(A, 5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
                    E = D;
                    D = C;
                    C = rotate_left(B, 30);
                    B = A;
                    A = temp;
                }

                for (i = 40; i <= 59; i++) {
                    temp = (rotate_left(A, 5) + ((B & C) | (B & D) | (C & D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
                    E = D;
                    D = C;
                    C = rotate_left(B, 30);
                    B = A;
                    A = temp;
                }

                for (i = 60; i <= 79; i++) {
                    temp = (rotate_left(A, 5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
                    E = D;
                    D = C;
                    C = rotate_left(B, 30);
                    B = A;
                    A = temp;
                }

                H0 = (H0 + A) & 0x0ffffffff;
                H1 = (H1 + B) & 0x0ffffffff;
                H2 = (H2 + C) & 0x0ffffffff;
                H3 = (H3 + D) & 0x0ffffffff;
                H4 = (H4 + E) & 0x0ffffffff;
            }

            temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);

            return temp.toLowerCase();
        }

        /************************************************************
         * end sha1
         ************************************************************/

        /*
         * Fix-up URL when page rendered from search engine cache or translated page
         */
        function urlFixup(hostName, href, referrer) {
            if (hostName === 'translate.googleusercontent.com') {       // Google
                if (referrer === '') {
                    referrer = href;
                }

                href = getParameter(href, 'u');
                hostName = getHostName(href);
            } else if (hostName === 'cc.bingj.com' ||                   // Bing
                    hostName === 'webcache.googleusercontent.com' ||    // Google
                    hostName.slice(0, 5) === '74.6.') {                 // Yahoo (via Inktomi 74.6.0.0/16)
                href = documentAlias.links[0].href;
                hostName = getHostName(href);
            }

            return [hostName, href, referrer];
        }

        /*
         * Fix-up domain
         */
        function domainFixup(domain) {
            var dl = domain.length;

            // remove trailing '.'
            if (domain.charAt(--dl) === '.') {
                domain = domain.slice(0, dl);
            }

            // remove leading '*'
            if (domain.slice(0, 2) === '*.') {
                domain = domain.slice(1);
            }

            return domain;
        }

        /*
         * Title fixup
         */
        function titleFixup(title) {
            title = title && title.text ? title.text : title;

            if (!isString(title)) {
                var tmp = documentAlias.getElementsByTagName('title');

                if (tmp && isDefined(tmp[0])) {
                    title = tmp[0].text;
                }
            }

            return title;
        }

        /************************************************************
         * Page Overlay
         ************************************************************/

        function getPiwikUrlForOverlay(trackerUrl, apiUrl) {
            if (apiUrl) {
                return apiUrl;
            }

            if (trackerUrl.slice(-9) === 'piwik.php') {
                trackerUrl = trackerUrl.slice(0, trackerUrl.length - 9);
            }

            return trackerUrl;
        }

        /*
         * Check whether this is a page overlay session
         *
         * @return boolean
         *
         * {@internal side-effect: modifies window.name }}
         */
        function isOverlaySession(configTrackerSiteId) {
            var windowName = 'Piwik_Overlay';

            // check whether we were redirected from the piwik overlay plugin
            var referrerRegExp = new RegExp('index\\.php\\?module=Overlay&action=startOverlaySession'
                               + '&idsite=([0-9]+)&period=([^&]+)&date=([^&]+)$');

            var match = referrerRegExp.exec(documentAlias.referrer);

            if (match) {
                // check idsite
                var idsite = match[1];

                if (idsite !== String(configTrackerSiteId)) {
                    return false;
                }

                // store overlay session info in window name
                var period = match[2],
                    date = match[3];

                windowAlias.name = windowName + '###' + period + '###' + date;
            }

            // retrieve and check data from window name
            var windowNameParts = windowAlias.name.split('###');

            return windowNameParts.length === 3 && windowNameParts[0] === windowName;
        }

        /*
         * Inject the script needed for page overlay
         */
        function injectOverlayScripts(configTrackerUrl, configApiUrl, configTrackerSiteId) {
            var windowNameParts = windowAlias.name.split('###'),
                period = windowNameParts[1],
                date = windowNameParts[2],
                piwikUrl = getPiwikUrlForOverlay(configTrackerUrl, configApiUrl);

            loadScript(
                piwikUrl + 'plugins/Overlay/client/client.js?v=1',
                function () {
                    Piwik_Overlay_Client.initialize(piwikUrl, configTrackerSiteId, period, date);
                }
            );
        }

        /************************************************************
         * End Page Overlay
         ************************************************************/

        /*
         * Piwik Tracker class
         *
         * trackerUrl and trackerSiteId are optional arguments to the constructor
         *
         * See: Tracker.setTrackerUrl() and Tracker.setSiteId()
         */
        function Tracker(trackerUrl, siteId) {

            /************************************************************
             * Private members
             ************************************************************/

            var
/*<DEBUG>*/
                /*
                 * registered test hooks
                 */
                registeredHooks = {},
/*</DEBUG>*/

                // Current URL and Referrer URL
                locationArray = urlFixup(documentAlias.domain, windowAlias.location.href, getReferrer()),
                domainAlias = domainFixup(locationArray[0]),
                locationHrefAlias = locationArray[1],
                configReferrerUrl = locationArray[2],

                // Request method (GET or POST)
                configRequestMethod = 'GET',

                // Tracker URL
                configTrackerUrl = trackerUrl || '',

                // API URL (only set if it differs from the Tracker URL)
                configApiUrl = '',

                // This string is appended to the Tracker URL Request (eg. to send data that is not handled by the existin setters/getters)
                configAppendToTrackingUrl = '',

                // Site ID
                configTrackerSiteId = siteId || '',

                // Document URL
                configCustomUrl,

                // Document title
                configTitle = documentAlias.title,

                // Extensions to be treated as download links
                configDownloadExtensions = '7z|aac|apk|ar[cj]|as[fx]|avi|bin|csv|deb|dmg|docx?|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|ms[ip]|od[bfgpst]|og[gv]|pdf|phps|png|pptx?|qtm?|ra[mr]?|rpm|sea|sit|tar|t?bz2?|tgz|torrent|txt|wav|wm[av]|wpd||xlsx?|xml|z|zip',

                // Hosts or alias(es) to not treat as outlinks
                configHostsAlias = [domainAlias],

                // HTML anchor element classes to not track
                configIgnoreClasses = [],

                // HTML anchor element classes to treat as downloads
                configDownloadClasses = [],

                // HTML anchor element classes to treat at outlinks
                configLinkClasses = [],

                // Maximum delay to wait for web bug image to be fetched (in milliseconds)
                configTrackerPause = 500,

                // Minimum visit time after initial page view (in milliseconds)
                configMinimumVisitTime,

                // Recurring heart beat after initial ping (in milliseconds)
                configHeartBeatTimer,

                // Disallow hash tags in URL
                configDiscardHashTag,

                // Custom data
                configCustomData,

                // Campaign names
                configCampaignNameParameters = [ 'pk_campaign', 'piwik_campaign', 'utm_campaign', 'utm_source', 'utm_medium' ],

                // Campaign keywords
                configCampaignKeywordParameters = [ 'pk_kwd', 'piwik_kwd', 'utm_term' ],

                // First-party cookie name prefix
                configCookieNamePrefix = '_pk_',

                // First-party cookie domain
                // User agent defaults to origin hostname
                configCookieDomain,

                // First-party cookie path
                // Default is user agent defined.
                configCookiePath,

                // Cookies are disabled
                configCookiesDisabled = false,

                // Do Not Track
                configDoNotTrack,

                // Count sites which are pre-rendered
                configCountPreRendered,

                // Do we attribute the conversion to the first referrer or the most recent referrer?
                configConversionAttributionFirstReferrer,

                // Life of the visitor cookie (in milliseconds)
                configVisitorCookieTimeout = 63072000000, // 2 years

                // Life of the session cookie (in milliseconds)
                configSessionCookieTimeout = 1800000, // 30 minutes

                // Life of the referral cookie (in milliseconds)
                configReferralCookieTimeout = 15768000000, // 6 months

                // Is performance tracking enabled
                configPerformanceTrackingEnabled = true,

                // Generation time set from the server
                configPerformanceGenerationTime = 0,

                // Custom Variables read from cookie, scope "visit"
                customVariables = false,

                // Custom Variables, scope "page"
                customVariablesPage = {},

                // Custom Variables, scope "event"
                customVariablesEvent = {},

                // Custom Variables names and values are each truncated before being sent in the request or recorded in the cookie
                customVariableMaximumLength = 200,

                // Ecommerce items
                ecommerceItems = {},

                // Browser features via client-side data collection
                browserFeatures = {},

                // Guard against installing the link tracker more than once per Tracker instance
                linkTrackingInstalled = false,

                // Guard against installing the activity tracker more than once per Tracker instance
                activityTrackingInstalled = false,

                // Last activity timestamp
                lastActivityTime,

                // Internal state of the pseudo click handler
                lastButton,
                lastTarget,

                // Hash function
                hash = sha1,

                // Domain hash value
                domainHash,

                // Visitor UUID
                visitorUUID;


            /*
             * Set cookie value
             */
            function setCookie(cookieName, value, msToExpire, path, domain, secure) {
                if (configCookiesDisabled) {
                    return;
                }

                var expiryDate;

                // relative time to expire in milliseconds
                if (msToExpire) {
                    expiryDate = new Date();
                    expiryDate.setTime(expiryDate.getTime() + msToExpire);
                }

                documentAlias.cookie = cookieName + '=' + encodeWrapper(value) +
                    (msToExpire ? ';expires=' + expiryDate.toGMTString() : '') +
                    ';path=' + (path || '/') +
                    (domain ? ';domain=' + domain : '') +
                    (secure ? ';secure' : '');
            }

            /*
             * Get cookie value
             */
            function getCookie(cookieName) {
                if (configCookiesDisabled) {
                    return 0;
                }

                var cookiePattern = new RegExp('(^|;)[ ]*' + cookieName + '=([^;]*)'),
                    cookieMatch = cookiePattern.exec(documentAlias.cookie);

                return cookieMatch ? decodeWrapper(cookieMatch[2]) : 0;
            }

            /*
             * Removes hash tag from the URL
             *
             * URLs are purified before being recorded in the cookie,
             * or before being sent as GET parameters
             */
            function purify(url) {
                var targetPattern;

                if (configDiscardHashTag) {
                    targetPattern = new RegExp('#.*');

                    return url.replace(targetPattern, '');
                }

                return url;
            }

            /*
             * Resolve relative reference
             *
             * Note: not as described in rfc3986 section 5.2
             */
            function resolveRelativeReference(baseUrl, url) {
                var protocol = getProtocolScheme(url),
                    i;

                if (protocol) {
                    return url;
                }

                if (url.slice(0, 1) === '/') {
                    return getProtocolScheme(baseUrl) + '://' + getHostName(baseUrl) + url;
                }

                baseUrl = purify(baseUrl);

                i = baseUrl.indexOf('?');
                if (i >= 0) {
                    baseUrl = baseUrl.slice(0, i);
                }

                i = baseUrl.lastIndexOf('/');
                if (i !== baseUrl.length - 1) {
                    baseUrl = baseUrl.slice(0, i + 1);
                }

                return baseUrl + url;
            }

            /*
             * Is the host local? (i.e., not an outlink)
             */
            function isSiteHostName(hostName) {
                var i,
                    alias,
                    offset;

                for (i = 0; i < configHostsAlias.length; i++) {
                    alias = domainFixup(configHostsAlias[i].toLowerCase());

                    if (hostName === alias) {
                        return true;
                    }

                    if (alias.slice(0, 1) === '.') {
                        if (hostName === alias.slice(1)) {
                            return true;
                        }

                        offset = hostName.length - alias.length;

                        if ((offset > 0) && (hostName.slice(offset) === alias)) {
                            return true;
                        }
                    }
                }

                return false;
            }

            /*
             * Send image request to Piwik server using GET.
             * The infamous web bug (or beacon) is a transparent, single pixel (1x1) image
             */
            function getImage(request) {
                var image = new Image(1, 1);

                image.onload = function () {
                    iterator = 0; // To avoid JSLint warning of empty block
                };
                image.src = configTrackerUrl + (configTrackerUrl.indexOf('?') < 0 ? '?' : '&') + request;
            }

            /*
             * POST request to Piwik server using XMLHttpRequest.
             */
            function sendXmlHttpRequest(request) {
                try {
                    // we use the progid Microsoft.XMLHTTP because
                    // IE5.5 included MSXML 2.5; the progid MSXML2.XMLHTTP
                    // is pinned to MSXML2.XMLHTTP.3.0
                    var xhr = windowAlias.XMLHttpRequest
                        ? new windowAlias.XMLHttpRequest()
                        : windowAlias.ActiveXObject
                        ? new ActiveXObject('Microsoft.XMLHTTP')
                        : null;

                    xhr.open('POST', configTrackerUrl, true);

                    // fallback on error
                    xhr.onreadystatechange = function () {
                        if (this.readyState === 4 && this.status !== 200) {
                            getImage(request);
                        }
                    };

                    // see XMLHttpRequest Level 2 spec, section 4.7.2 for invalid headers
                    // @link http://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html
                    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');

                    xhr.send(request);
                } catch (e) {
                    // fallback
                    getImage(request);
                }
            }

            /*
             * Send request
             */
            function sendRequest(request, delay) {
                var now = new Date();

                if (!configDoNotTrack) {
                    if (configRequestMethod === 'POST') {
                        sendXmlHttpRequest(request);
                    } else {
                        getImage(request);
                    }

                    expireDateTime = now.getTime() + delay;
                }
            }

            /*
             * Get cookie name with prefix and domain hash
             */
            function getCookieName(baseName) {
                // NOTE: If the cookie name is changed, we must also update the PiwikTracker.php which
                // will attempt to discover first party cookies. eg. See the PHP Client method getVisitorId()
                return configCookieNamePrefix + baseName + '.' + configTrackerSiteId + '.' + domainHash;
            }

            /*
             * Does browser have cookies enabled (for this site)?
             */
            function hasCookies() {
                if (configCookiesDisabled) {
                    return '0';
                }

                if (!isDefined(navigatorAlias.cookieEnabled)) {
                    var testCookieName = getCookieName('testcookie');
                    setCookie(testCookieName, '1');

                    return getCookie(testCookieName) === '1' ? '1' : '0';
                }

                return navigatorAlias.cookieEnabled ? '1' : '0';
            }

            /*
             * Update domain hash
             */
            function updateDomainHash() {
                domainHash = hash((configCookieDomain || domainAlias) + (configCookiePath || '/')).slice(0, 4); // 4 hexits = 16 bits
            }

            /*
             * Inits the custom variables object
             */
            function getCustomVariablesFromCookie() {
                var cookieName = getCookieName('cvar'),
                    cookie = getCookie(cookieName);

                if (cookie.length) {
                    cookie = JSON2.parse(cookie);

                    if (isObject(cookie)) {
                        return cookie;
                    }
                }

                return {};
            }

            /*
             * Lazy loads the custom variables from the cookie, only once during this page view
             */
            function loadCustomVariables() {
                if (customVariables === false) {
                    customVariables = getCustomVariablesFromCookie();
                }
            }

            /*
             * Process all "activity" events.
             * For performance, this function must have low overhead.
             */
            function activityHandler() {
                var now = new Date();

                lastActivityTime = now.getTime();
            }

            /*
             * Sets the Visitor ID cookie: either the first time loadVisitorIdCookie is called
             * or when there is a new visit or a new page view
             */
            function setVisitorIdCookie(uuid, createTs, visitCount, nowTs, lastVisitTs, lastEcommerceOrderTs) {
                setCookie(getCookieName('id'), uuid + '.' + createTs + '.' + visitCount + '.' + nowTs + '.' + lastVisitTs + '.' + lastEcommerceOrderTs, configVisitorCookieTimeout, configCookiePath, configCookieDomain);
            }

            /*
             * Load visitor ID cookie
             */
            function loadVisitorIdCookie() {
                var now = new Date(),
                    nowTs = Math.round(now.getTime() / 1000),
                    id = getCookie(getCookieName('id')),
                    tmpContainer;

                if (id) {
                    tmpContainer = id.split('.');

                    // returning visitor flag
                    tmpContainer.unshift('0');
                } else {
                    // uuid - generate a pseudo-unique ID to fingerprint this user;
                    // note: this isn't a RFC4122-compliant UUID
                    if (!visitorUUID) {
                        visitorUUID = hash(
                            (navigatorAlias.userAgent || '') +
                                (navigatorAlias.platform || '') +
                                JSON2.stringify(browserFeatures) + nowTs
                        ).slice(0, 16); // 16 hexits = 64 bits
                    }

                    tmpContainer = [
                        // new visitor
                        '1',

                        // uuid
                        visitorUUID,

                        // creation timestamp - seconds since Unix epoch
                        nowTs,

                        // visitCount - 0 = no previous visit
                        0,

                        // current visit timestamp
                        nowTs,

                        // last visit timestamp - blank = no previous visit
                        '',

                        // last ecommerce order timestamp
                        ''
                    ];
                }

                return tmpContainer;
            }

            /*
             * Loads the referrer attribution information
             *
             * @returns array
             *  0: campaign name
             *  1: campaign keyword
             *  2: timestamp
             *  3: raw URL
             */
            function loadReferrerAttributionCookie() {
                // NOTE: if the format of the cookie changes,
                // we must also update JS tests, PHP tracker, Integration tests,
                // and notify other tracking clients (eg. Java) of the changes
                var cookie = getCookie(getCookieName('ref'));

                if (cookie.length) {
                    try {
                        cookie = JSON2.parse(cookie);
                        if (isObject(cookie)) {
                            return cookie;
                        }
                    } catch (ignore) {
                        // Pre 1.3, this cookie was not JSON encoded
                    }
                }

                return [
                    '',
                    '',
                    0,
                    ''
                ];
            }

            function deleteCookies() {
                var savedConfigCookiesDisabled = configCookiesDisabled;

                // Temporarily allow cookies just to delete the existing ones
                configCookiesDisabled = false;
                setCookie(getCookieName('id'), '', -86400, configCookiePath, configCookieDomain);
                setCookie(getCookieName('ses'), '', -86400, configCookiePath, configCookieDomain);
                setCookie(getCookieName('cvar'), '', -86400, configCookiePath, configCookieDomain);
                setCookie(getCookieName('ref'), '', -86400, configCookiePath, configCookieDomain);

                configCookiesDisabled = savedConfigCookiesDisabled;
            }

            function sortObjectByKeys(value) {
                if (!value || !isObject(value)) {
                    return;
                }

                // Object.keys(value) is not supported by all browsers, we get the keys manually
                var keys = [];
                var key;

                for (key in value) {
                    if (Object.prototype.hasOwnProperty.call(value, key)) {
                        keys.push(key);
                    }
                }

                var normalized = {};
                keys.sort();
                var len = keys.length;
                var i;

                for (i = 0; i < len; i++) {
                    normalized[keys[i]] = value[keys[i]];
                }

                return normalized;
            }

            /**
             * Returns the URL to call piwik.php,
             * with the standard parameters (plugins, resolution, url, referrer, etc.).
             * Sends the pageview and browser settings with every request in case of race conditions.
             */
            function getRequest(request, customData, pluginMethod, currentEcommerceOrderTs) {
                var i,
                    now = new Date(),
                    nowTs = Math.round(now.getTime() / 1000),
                    newVisitor,
                    uuid,
                    visitCount,
                    createTs,
                    currentVisitTs,
                    lastVisitTs,
                    lastEcommerceOrderTs,
                    referralTs,
                    referralUrl,
                    referralUrlMaxLength = 1024,
                    currentReferrerHostName,
                    originalReferrerHostName,
                    customVariablesCopy = customVariables,
                    sesname = getCookieName('ses'),
                    refname = getCookieName('ref'),
                    cvarname = getCookieName('cvar'),
                    id = loadVisitorIdCookie(),
                    ses = getCookie(sesname),
                    attributionCookie = loadReferrerAttributionCookie(),
                    currentUrl = configCustomUrl || locationHrefAlias,
                    campaignNameDetected,
                    campaignKeywordDetected;

                if (configCookiesDisabled) {
                    deleteCookies();
                }

                if (configDoNotTrack) {
                    return '';
                }

                newVisitor = id[0];
                uuid = id[1];
                createTs = id[2];
                visitCount = id[3];
                currentVisitTs = id[4];
                lastVisitTs = id[5];
                // case migrating from pre-1.5 cookies
                if (!isDefined(id[6])) {
                    id[6] = "";
                }

                lastEcommerceOrderTs = id[6];

                if (!isDefined(currentEcommerceOrderTs)) {
                    currentEcommerceOrderTs = "";
                }

                // send charset if document charset is not utf-8. sometimes encoding
                // of urls will be the same as this and not utf-8, which will cause problems
                // do not send charset if it is utf8 since it's assumed by default in Piwik
                var charSet = documentAlias.characterSet || documentAlias.charset;

                if (!charSet || charSet.toLowerCase() === 'utf-8') {
                    charSet = null;
                }

                campaignNameDetected = attributionCookie[0];
                campaignKeywordDetected = attributionCookie[1];
                referralTs = attributionCookie[2];
                referralUrl = attributionCookie[3];

                if (!ses) {
                    // cookie 'ses' was not found: we consider this the start of a 'session'

                    // here we make sure that if 'ses' cookie is deleted few times within the visit
                    // and so this code path is triggered many times for one visit,
                    // we only increase visitCount once per Visit window (default 30min)
                    var visitDuration = configSessionCookieTimeout / 1000;
                    if (!lastVisitTs
                            || (nowTs - lastVisitTs) > visitDuration) {
                        visitCount++;
                        lastVisitTs = currentVisitTs;
                    }


                    // Detect the campaign information from the current URL
                    // Only if campaign wasn't previously set
                    // Or if it was set but we must attribute to the most recent one
                    // Note: we are working on the currentUrl before purify() since we can parse the campaign parameters in the hash tag
                    if (!configConversionAttributionFirstReferrer
                            || !campaignNameDetected.length) {
                        for (i in configCampaignNameParameters) {
                            if (Object.prototype.hasOwnProperty.call(configCampaignNameParameters, i)) {
                                campaignNameDetected = getParameter(currentUrl, configCampaignNameParameters[i]);

                                if (campaignNameDetected.length) {
                                    break;
                                }
                            }
                        }

                        for (i in configCampaignKeywordParameters) {
                            if (Object.prototype.hasOwnProperty.call(configCampaignKeywordParameters, i)) {
                                campaignKeywordDetected = getParameter(currentUrl, configCampaignKeywordParameters[i]);

                                if (campaignKeywordDetected.length) {
                                    break;
                                }
                            }
                        }
                    }

                    // Store the referrer URL and time in the cookie;
                    // referral URL depends on the first or last referrer attribution
                    currentReferrerHostName = getHostName(configReferrerUrl);
                    originalReferrerHostName = referralUrl.length ? getHostName(referralUrl) : '';

                    if (currentReferrerHostName.length && // there is a referrer
                            !isSiteHostName(currentReferrerHostName) && // domain is not the current domain
                            (!configConversionAttributionFirstReferrer || // attribute to last known referrer
                            !originalReferrerHostName.length || // previously empty
                            isSiteHostName(originalReferrerHostName))) { // previously set but in current domain
                        referralUrl = configReferrerUrl;
                    }

                    // Set the referral cookie if we have either a Referrer URL, or detected a Campaign (or both)
                    if (referralUrl.length
                            || campaignNameDetected.length) {
                        referralTs = nowTs;
                        attributionCookie = [
                            campaignNameDetected,
                            campaignKeywordDetected,
                            referralTs,
                            purify(referralUrl.slice(0, referralUrlMaxLength))
                        ];

                        setCookie(refname, JSON2.stringify(attributionCookie), configReferralCookieTimeout, configCookiePath, configCookieDomain);
                    }
                }
                // build out the rest of the request
                request += '&idsite=' + configTrackerSiteId +
                    '&rec=1' +
                    '&r=' + String(Math.random()).slice(2, 8) + // keep the string to a minimum
                    '&h=' + now.getHours() + '&m=' + now.getMinutes() + '&s=' + now.getSeconds() +
                    '&url=' + encodeWrapper(purify(currentUrl)) +
                    (configReferrerUrl.length ? '&urlref=' + encodeWrapper(purify(configReferrerUrl)) : '') +
                    '&_id=' + uuid + '&_idts=' + createTs + '&_idvc=' + visitCount +
                    '&_idn=' + newVisitor + // currently unused
                    (campaignNameDetected.length ? '&_rcn=' + encodeWrapper(campaignNameDetected) : '') +
                    (campaignKeywordDetected.length ? '&_rck=' + encodeWrapper(campaignKeywordDetected) : '') +
                    '&_refts=' + referralTs +
                    '&_viewts=' + lastVisitTs +
                    (String(lastEcommerceOrderTs).length ? '&_ects=' + lastEcommerceOrderTs : '') +
                    (String(referralUrl).length ? '&_ref=' + encodeWrapper(purify(referralUrl.slice(0, referralUrlMaxLength))) : '') +
                    (charSet ? '&cs=' + encodeWrapper(charSet) : '');


                // browser features
                for (i in browserFeatures) {
                    if (Object.prototype.hasOwnProperty.call(browserFeatures, i)) {
                        request += '&' + i + '=' + browserFeatures[i];
                    }
                }

                // custom data
                if (customData) {
                    request += '&data=' + encodeWrapper(JSON2.stringify(customData));
                } else if (configCustomData) {
                    request += '&data=' + encodeWrapper(JSON2.stringify(configCustomData));
                }

                // Custom Variables, scope "page"
                function appendCustomVariablesToRequest(customVariables, parameterName) {
                    var customVariablesStringified = JSON2.stringify(customVariables);
                    if (customVariablesStringified.length > 2) {
                        return '&' + parameterName + '=' + encodeWrapper(customVariablesStringified);
                    }
                    return '';
                }

                var sortedCustomVarPage  = sortObjectByKeys(customVariablesPage);
                var sortedCustomVarEvent = sortObjectByKeys(customVariablesEvent);

                request += appendCustomVariablesToRequest(sortedCustomVarPage, 'cvar');
                request += appendCustomVariablesToRequest(sortedCustomVarEvent, 'e_cvar');

                // Custom Variables, scope "visit"
                if (customVariables) {
                    request += appendCustomVariablesToRequest(customVariables, '_cvar');

                    // Don't save deleted custom variables in the cookie
                    for (i in customVariablesCopy) {
                        if (Object.prototype.hasOwnProperty.call(customVariablesCopy, i)) {
                            if (customVariables[i][0] === '' || customVariables[i][1] === '') {
                                delete customVariables[i];
                            }
                        }
                    }

                    setCookie(cvarname, JSON2.stringify(customVariables), configSessionCookieTimeout, configCookiePath, configCookieDomain);
                }

                // performance tracking
                if (configPerformanceTrackingEnabled) {
                    if (configPerformanceGenerationTime) {
                        request += '&gt_ms=' + configPerformanceGenerationTime;
                    } else if (performanceAlias && performanceAlias.timing
                            && performanceAlias.timing.requestStart && performanceAlias.timing.responseEnd) {
                        request += '&gt_ms=' + (performanceAlias.timing.responseEnd - performanceAlias.timing.requestStart);
                    }
                }

                // update cookies
                setVisitorIdCookie(uuid, createTs, visitCount, nowTs, lastVisitTs, isDefined(currentEcommerceOrderTs) && String(currentEcommerceOrderTs).length ? currentEcommerceOrderTs : lastEcommerceOrderTs);
                setCookie(sesname, '*', configSessionCookieTimeout, configCookiePath, configCookieDomain);

                // tracker plugin hook
                request += executePluginMethod(pluginMethod);

                if (configAppendToTrackingUrl.length) {
                    request += '&' + configAppendToTrackingUrl;
                }
                return request;
            }

            function logEcommerce(orderId, grandTotal, subTotal, tax, shipping, discount) {
                var request = 'idgoal=0',
                    lastEcommerceOrderTs,
                    now = new Date(),
                    items = [],
                    sku;

                if (String(orderId).length) {
                    request += '&ec_id=' + encodeWrapper(orderId);
                    // Record date of order in the visitor cookie
                    lastEcommerceOrderTs = Math.round(now.getTime() / 1000);
                }

                request += '&revenue=' + grandTotal;

                if (String(subTotal).length) {
                    request += '&ec_st=' + subTotal;
                }

                if (String(tax).length) {
                    request += '&ec_tx=' + tax;
                }

                if (String(shipping).length) {
                    request += '&ec_sh=' + shipping;
                }

                if (String(discount).length) {
                    request += '&ec_dt=' + discount;
                }

                if (ecommerceItems) {
                    // Removing the SKU index in the array before JSON encoding
                    for (sku in ecommerceItems) {
                        if (Object.prototype.hasOwnProperty.call(ecommerceItems, sku)) {
                            // Ensure name and category default to healthy value
                            if (!isDefined(ecommerceItems[sku][1])) {
                                ecommerceItems[sku][1] = "";
                            }

                            if (!isDefined(ecommerceItems[sku][2])) {
                                ecommerceItems[sku][2] = "";
                            }

                            // Set price to zero
                            if (!isDefined(ecommerceItems[sku][3])
                                    || String(ecommerceItems[sku][3]).length === 0) {
                                ecommerceItems[sku][3] = 0;
                            }

                            // Set quantity to 1
                            if (!isDefined(ecommerceItems[sku][4])
                                    || String(ecommerceItems[sku][4]).length === 0) {
                                ecommerceItems[sku][4] = 1;
                            }

                            items.push(ecommerceItems[sku]);
                        }
                    }
                    request += '&ec_items=' + encodeWrapper(JSON2.stringify(items));
                }
                request = getRequest(request, configCustomData, 'ecommerce', lastEcommerceOrderTs);
                sendRequest(request, configTrackerPause);
            }

            function logEcommerceOrder(orderId, grandTotal, subTotal, tax, shipping, discount) {
                if (String(orderId).length
                        && isDefined(grandTotal)) {
                    logEcommerce(orderId, grandTotal, subTotal, tax, shipping, discount);
                }
            }

            function logEcommerceCartUpdate(grandTotal) {
                if (isDefined(grandTotal)) {
                    logEcommerce("", grandTotal, "", "", "", "");
                }
            }

            /*
             * Log the page view / visit
             */
            function logPageView(customTitle, customData) {
                var now = new Date(),
                    request = getRequest('action_name=' + encodeWrapper(titleFixup(customTitle || configTitle)), customData, 'log');

                sendRequest(request, configTrackerPause);

                // send ping
                if (configMinimumVisitTime && configHeartBeatTimer && !activityTrackingInstalled) {
                    activityTrackingInstalled = true;

                    // add event handlers; cross-browser compatibility here varies significantly
                    // @see http://quirksmode.org/dom/events
                    addEventListener(documentAlias, 'click', activityHandler);
                    addEventListener(documentAlias, 'mouseup', activityHandler);
                    addEventListener(documentAlias, 'mousedown', activityHandler);
                    addEventListener(documentAlias, 'mousemove', activityHandler);
                    addEventListener(documentAlias, 'mousewheel', activityHandler);
                    addEventListener(windowAlias, 'DOMMouseScroll', activityHandler);
                    addEventListener(windowAlias, 'scroll', activityHandler);
                    addEventListener(documentAlias, 'keypress', activityHandler);
                    addEventListener(documentAlias, 'keydown', activityHandler);
                    addEventListener(documentAlias, 'keyup', activityHandler);
                    addEventListener(windowAlias, 'resize', activityHandler);
                    addEventListener(windowAlias, 'focus', activityHandler);
                    addEventListener(windowAlias, 'blur', activityHandler);

                    // periodic check for activity
                    lastActivityTime = now.getTime();
                    setTimeout(function heartBeat() {
                        var requestPing;
                        now = new Date();

                        // there was activity during the heart beat period;
                        // on average, this is going to overstate the visitDuration by configHeartBeatTimer/2
                        if ((lastActivityTime + configHeartBeatTimer) > now.getTime()) {
                            // send ping if minimum visit time has elapsed
                            if (configMinimumVisitTime < now.getTime()) {
                                requestPing = getRequest('ping=1', customData, 'ping');

                                sendRequest(requestPing, configTrackerPause);
                            }

                            // resume heart beat
                            setTimeout(heartBeat, configHeartBeatTimer);
                        }
                        // else heart beat cancelled due to inactivity
                    }, configHeartBeatTimer);
                }
            }

            /*
             * Log the event
             */
            function logEvent(category, action, name, value, customData) {
                // Category and Action are required parameters
                if (String(category).length === 0 || String(action).length === 0) {
                    return false;
                }
                var request = getRequest(
                        'e_c=' + encodeWrapper(category)
                            + '&e_a=' + encodeWrapper(action)
                            + (isDefined(name) ? '&e_n=' + encodeWrapper(name) : '')
                            + (isDefined(value) ? '&e_v=' + encodeWrapper(value) : ''),
                        customData,
                        'event'
                    );

                sendRequest(request, configTrackerPause);
            }

            /*
             * Log the site search request
             */
            function logSiteSearch(keyword, category, resultsCount, customData) {
                var request = getRequest('search=' + encodeWrapper(keyword)
                                + (category ? '&search_cat=' + encodeWrapper(category) : '')
                                + (isDefined(resultsCount) ? '&search_count=' + resultsCount : ''), customData, 'sitesearch');

                sendRequest(request, configTrackerPause);
            }

            /*
             * Log the goal with the server
             */
            function logGoal(idGoal, customRevenue, customData) {
                var request = getRequest('idgoal=' + idGoal + (customRevenue ? '&revenue=' + customRevenue : ''), customData, 'goal');

                sendRequest(request, configTrackerPause);
            }

            /*
             * Log the link or click with the server
             */
            function logLink(url, linkType, customData) {
                var request = getRequest(linkType + '=' + encodeWrapper(purify(url)), customData, 'link');

                sendRequest(request, configTrackerPause);
            }

            /*
             * Browser prefix
             */
            function prefixPropertyName(prefix, propertyName) {
                if (prefix !== '') {
                    return prefix + propertyName.charAt(0).toUpperCase() + propertyName.slice(1);
                }

                return propertyName;
            }

            /*
             * Check for pre-rendered web pages, and log the page view/link/goal
             * according to the configuration and/or visibility
             *
             * @see http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/PageVisibility/Overview.html
             */
            function trackCallback(callback) {
                var isPreRendered,
                    i,
                    // Chrome 13, IE10, FF10
                    prefixes = ['', 'webkit', 'ms', 'moz'],
                    prefix;

                if (!configCountPreRendered) {
                    for (i = 0; i < prefixes.length; i++) {
                        prefix = prefixes[i];

                        // does this browser support the page visibility API?
                        if (Object.prototype.hasOwnProperty.call(documentAlias, prefixPropertyName(prefix, 'hidden'))) {
                            // if pre-rendered, then defer callback until page visibility changes
                            if (documentAlias[prefixPropertyName(prefix, 'visibilityState')] === 'prerender') {
                                isPreRendered = true;
                            }
                            break;
                        }
                    }
                }

                if (isPreRendered) {
                    // note: the event name doesn't follow the same naming convention as vendor properties
                    addEventListener(documentAlias, prefix + 'visibilitychange', function ready() {
                        documentAlias.removeEventListener(prefix + 'visibilitychange', ready, false);
                        callback();
                    });

                    return;
                }

                // configCountPreRendered === true || isPreRendered === false
                callback();
            }

            /*
             * Construct regular expression of classes
             */
            function getClassesRegExp(configClasses, defaultClass) {
                var i,
                    classesRegExp = '(^| )(piwik[_-]' + defaultClass;

                if (configClasses) {
                    for (i = 0; i < configClasses.length; i++) {
                        classesRegExp += '|' + configClasses[i];
                    }
                }

                classesRegExp += ')( |$)';

                return new RegExp(classesRegExp);
            }

            /*
             * Link or Download?
             */
            function getLinkType(className, href, isInLink) {
                // does class indicate whether it is an (explicit/forced) outlink or a download?
                var downloadPattern = getClassesRegExp(configDownloadClasses, 'download'),
                    linkPattern = getClassesRegExp(configLinkClasses, 'link'),

                    // does file extension indicate that it is a download?
                    downloadExtensionsPattern = new RegExp('\\.(' + configDownloadExtensions + ')([?&#]|$)', 'i');

                // optimization of the if..elseif..else construct below
                return linkPattern.test(className) ? 'link' : (downloadPattern.test(className) || downloadExtensionsPattern.test(href) ? 'download' : (isInLink ? 0 : 'link'));

/*
                var linkType = 0;

                if (linkPattern.test(className)) {
                    // class attribute contains 'piwik_link' (or user's override)
                    linkType = 'link';
                } else if (downloadPattern.test(className)) {
                    // class attribute contains 'piwik_download' (or user's override)
                    linkType = 'download';
                } else if (downloadExtensionsPattern.test(sourceHref)) {
                    // file extension matches a defined download extension
                    linkType = 'download';
                } else if (!isInLink) {
                    linkType = 'link';
                }

                return linkType;
 */
            }

            /*
             * Process clicks
             */
            function processClick(sourceElement) {
                var parentElement,
                    tag,
                    linkType;

                parentElement = sourceElement.parentNode;
                while (parentElement !== null &&
                        /* buggy IE5.5 */
                        isDefined(parentElement)) {
                    tag = sourceElement.tagName.toUpperCase();
                    if (tag === 'A' || tag === 'AREA') {
                        break;
                    }
                    sourceElement = parentElement;
                    parentElement = sourceElement.parentNode;
                }

                if (isDefined(sourceElement.href)) {
                    // browsers, such as Safari, don't downcase hostname and href
                    var originalSourceHostName = sourceElement.hostname || getHostName(sourceElement.href),
                        sourceHostName = originalSourceHostName.toLowerCase(),
                        sourceHref = sourceElement.href.replace(originalSourceHostName, sourceHostName),
                        scriptProtocol = new RegExp('^(javascript|vbscript|jscript|mocha|livescript|ecmascript|mailto):', 'i');

                    // ignore script pseudo-protocol links
                    if (!scriptProtocol.test(sourceHref)) {
                        // track outlinks and all downloads
                        linkType = getLinkType(sourceElement.className, sourceHref, isSiteHostName(sourceHostName));

                        if (linkType) {
                            // urldecode %xx
                            sourceHref = urldecode(sourceHref);
                            logLink(sourceHref, linkType);
                        }
                    }
                }
            }

            /*
             * Handle click event
             */
            function clickHandler(evt) {
                var button,
                    target;

                evt = evt || windowAlias.event;
                button = evt.which || evt.button;
                target = evt.target || evt.srcElement;

                // Using evt.type (added in IE4), we avoid defining separate handlers for mouseup and mousedown.
                if (evt.type === 'click') {
                    if (target) {
                        processClick(target);
                    }
                } else if (evt.type === 'mousedown') {
                    if ((button === 1 || button === 2) && target) {
                        lastButton = button;
                        lastTarget = target;
                    } else {
                        lastButton = lastTarget = null;
                    }
                } else if (evt.type === 'mouseup') {
                    if (button === lastButton && target === lastTarget) {
                        processClick(target);
                    }
                    lastButton = lastTarget = null;
                }
            }

            /*
             * Add click listener to a DOM element
             */
            function addClickListener(element, enable) {
                if (enable) {
                    // for simplicity and performance, we ignore drag events
                    addEventListener(element, 'mouseup', clickHandler, false);
                    addEventListener(element, 'mousedown', clickHandler, false);
                } else {
                    addEventListener(element, 'click', clickHandler, false);
                }
            }

            /*
             * Add click handlers to anchor and AREA elements, except those to be ignored
             */
            function addClickListeners(enable) {
                if (!linkTrackingInstalled) {
                    linkTrackingInstalled = true;

                    // iterate through anchor elements with href and AREA elements

                    var i,
                        ignorePattern = getClassesRegExp(configIgnoreClasses, 'ignore'),
                        linkElements = documentAlias.links;

                    if (linkElements) {
                        for (i = 0; i < linkElements.length; i++) {
                            if (!ignorePattern.test(linkElements[i].className)) {
                                addClickListener(linkElements[i], enable);
                            }
                        }
                    }
                }
            }

            /*
             * Browser features (plugins, resolution, cookies)
             */
            function detectBrowserFeatures() {
                var i,
                    mimeType,
                    pluginMap = {
                        // document types
                        pdf: 'application/pdf',

                        // media players
                        qt: 'video/quicktime',
                        realp: 'audio/x-pn-realaudio-plugin',
                        wma: 'application/x-mplayer2',

                        // interactive multimedia
                        dir: 'application/x-director',
                        fla: 'application/x-shockwave-flash',

                        // RIA
                        java: 'application/x-java-vm',
                        gears: 'application/x-googlegears',
                        ag: 'application/x-silverlight'
                    },
                    devicePixelRatio = (new RegExp('Mac OS X.*Safari/')).test(navigatorAlias.userAgent) ? windowAlias.devicePixelRatio || 1 : 1;

                if (!((new RegExp('MSIE')).test(navigatorAlias.userAgent))) {
                    // general plugin detection
                    if (navigatorAlias.mimeTypes && navigatorAlias.mimeTypes.length) {
                        for (i in pluginMap) {
                            if (Object.prototype.hasOwnProperty.call(pluginMap, i)) {
                                mimeType = navigatorAlias.mimeTypes[pluginMap[i]];
                                browserFeatures[i] = (mimeType && mimeType.enabledPlugin) ? '1' : '0';
                            }
                        }
                    }

                    // Safari and Opera
                    // IE6/IE7 navigator.javaEnabled can't be aliased, so test directly
                    if (typeof navigator.javaEnabled !== 'unknown' &&
                            isDefined(navigatorAlias.javaEnabled) &&
                            navigatorAlias.javaEnabled()) {
                        browserFeatures.java = '1';
                    }

                    // Firefox
                    if (isFunction(windowAlias.GearsFactory)) {
                        browserFeatures.gears = '1';
                    }

                    // other browser features
                    browserFeatures.cookie = hasCookies();
                }

                // screen resolution
                // - only Apple reports screen.* in device-independent-pixels (dips)
                // - devicePixelRatio is always 2 on MacOSX+Retina regardless of resolution set in Display Preferences
                browserFeatures.res = screenAlias.width * devicePixelRatio + 'x' + screenAlias.height * devicePixelRatio;
            }

/*<DEBUG>*/
            /*
             * Register a test hook. Using eval() permits access to otherwise
             * privileged members.
             */
            function registerHook(hookName, userHook) {
                var hookObj = null;

                if (isString(hookName) && !isDefined(registeredHooks[hookName]) && userHook) {
                    if (isObject(userHook)) {
                        hookObj = userHook;
                    } else if (isString(userHook)) {
                        try {
                            eval('hookObj =' + userHook);
                        } catch (ignore) { }
                    }

                    registeredHooks[hookName] = hookObj;
                }

                return hookObj;
            }
/*</DEBUG>*/

            /************************************************************
             * Constructor
             ************************************************************/

            /*
             * initialize tracker
             */
            detectBrowserFeatures();
            updateDomainHash();

/*<DEBUG>*/
            /*
             * initialize test plugin
             */
            executePluginMethod('run', registerHook);
/*</DEBUG>*/

            /************************************************************
             * Public data and methods
             ************************************************************/

            return {
/*<DEBUG>*/
                /*
                 * Test hook accessors
                 */
                hook: registeredHooks,
                getHook: function (hookName) {
                    return registeredHooks[hookName];
                },
/*</DEBUG>*/

                /**
                 * Get visitor ID (from first party cookie)
                 *
                 * @return string Visitor ID in hexits (or null, if not yet known)
                 */
                getVisitorId: function () {
                    return (loadVisitorIdCookie())[1];
                },

                /**
                 * Get the visitor information (from first party cookie)
                 *
                 * @return array
                 */
                getVisitorInfo: function () {
                    return loadVisitorIdCookie();
                },

                /**
                 * Get the Attribution information, which is an array that contains
                 * the Referrer used to reach the site as well as the campaign name and keyword
                 * It is useful only when used in conjunction with Tracker API function setAttributionInfo()
                 * To access specific data point, you should use the other functions getAttributionReferrer* and getAttributionCampaign*
                 *
                 * @return array Attribution array, Example use:
                 *   1) Call JSON2.stringify(piwikTracker.getAttributionInfo())
                 *   2) Pass this json encoded string to the Tracking API (php or java client): setAttributionInfo()
                 */
                getAttributionInfo: function () {
                    return loadReferrerAttributionCookie();
                },

                /**
                 * Get the Campaign name that was parsed from the landing page URL when the visitor
                 * landed on the site originally
                 *
                 * @return string
                 */
                getAttributionCampaignName: function () {
                    return loadReferrerAttributionCookie()[0];
                },

                /**
                 * Get the Campaign keyword that was parsed from the landing page URL when the visitor
                 * landed on the site originally
                 *
                 * @return string
                 */
                getAttributionCampaignKeyword: function () {
                    return loadReferrerAttributionCookie()[1];
                },

                /**
                 * Get the time at which the referrer (used for Goal Attribution) was detected
                 *
                 * @return int Timestamp or 0 if no referrer currently set
                 */
                getAttributionReferrerTimestamp: function () {
                    return loadReferrerAttributionCookie()[2];
                },

                /**
                 * Get the full referrer URL that will be used for Goal Attribution
                 *
                 * @return string Raw URL, or empty string '' if no referrer currently set
                 */
                getAttributionReferrerUrl: function () {
                    return loadReferrerAttributionCookie()[3];
                },

                /**
                 * Specify the Piwik server URL
                 *
                 * @param string trackerUrl
                 */
                setTrackerUrl: function (trackerUrl) {
                    configTrackerUrl = trackerUrl;
                },

                /**
                 * Specify the site ID
                 *
                 * @param int|string siteId
                 */
                setSiteId: function (siteId) {
                    configTrackerSiteId = siteId;
                },

                /**
                 * Pass custom data to the server
                 *
                 * Examples:
                 *   tracker.setCustomData(object);
                 *   tracker.setCustomData(key, value);
                 *
                 * @param mixed key_or_obj
                 * @param mixed opt_value
                 */
                setCustomData: function (key_or_obj, opt_value) {
                    if (isObject(key_or_obj)) {
                        configCustomData = key_or_obj;
                    } else {
                        if (!configCustomData) {
                            configCustomData = [];
                        }
                        configCustomData[key_or_obj] = opt_value;
                    }
                },

                /**
                 * Appends the specified query string to the piwik.php?... Tracking API URL
                 *
                 * @param string queryString eg. 'lat=140&long=100'
                 */
                appendToTrackingUrl: function (queryString) {
                    configAppendToTrackingUrl = queryString;
                },

                /**
                 * Get custom data
                 *
                 * @return mixed
                 */
                getCustomData: function () {
                    return configCustomData;
                },


                /**
                 * Set custom variable within this visit
                 *
                 * @param int index
                 * @param string name
                 * @param string value
                 * @param string scope Scope of Custom Variable:
                 *                     - "visit" will store the name/value in the visit and will persist it in the cookie for the duration of the visit,
                 *                     - "page" will store the name/value in the next page view tracked.
                 *                     - "event" will store the name/value in the next event tracked.
                 */
                setCustomVariable: function (index, name, value, scope) {
                    var toRecord;

                    if (!isDefined(scope)) {
                        scope = 'visit';
                    }

                    if (index > 0) {
                        name = isDefined(name) && !isString(name) ? String(name) : name;
                        value = isDefined(value) && !isString(value) ? String(value) : value;
                        toRecord = [name.slice(0, customVariableMaximumLength), value.slice(0, customVariableMaximumLength)];
                        if (scope === 'visit' || scope === 2) { /* GA compatibility/misuse */
                            loadCustomVariables();
                            customVariables[index] = toRecord;
                        } else if (scope === 'page' || scope === 3) { /* GA compatibility/misuse */
                            customVariablesPage[index] = toRecord;
                        } else if (scope === 'event') { /* GA does not have 'event' scope but we do */
                            customVariablesEvent[index] = toRecord;
                        }
                    }
                },

                /**
                 * Get custom variable
                 *
                 * @param int index
                 * @param string scope Scope of Custom Variable: "visit" or "page" or "event"
                 */
                getCustomVariable: function (index, scope) {
                    var cvar;

                    if (!isDefined(scope)) {
                        scope = "visit";
                    }

                    if (scope === "page" || scope === 3) {
                        cvar = customVariablesPage[index];
                    } else if (scope === "event") {
                        cvar = customVariablesEvent[index];
                    } else if (scope === "visit" || scope === 2) {
                        loadCustomVariables();
                        cvar = customVariables[index];
                    }

                    if (!isDefined(cvar)
                            || (cvar && cvar[0] === '')) {
                        return false;
                    }

                    return cvar;
                },

                /**
                 * Delete custom variable
                 *
                 * @param int index
                 */
                deleteCustomVariable: function (index, scope) {
                    // Only delete if it was there already
                    if (this.getCustomVariable(index, scope)) {
                        this.setCustomVariable(index, '', '', scope);
                    }
                },

                /**
                 * Set delay for link tracking (in milliseconds)
                 *
                 * @param int delay
                 */
                setLinkTrackingTimer: function (delay) {
                    configTrackerPause = delay;
                },

                /**
                 * Set list of file extensions to be recognized as downloads
                 *
                 * @param string extensions
                 */
                setDownloadExtensions: function (extensions) {
                    configDownloadExtensions = extensions;
                },

                /**
                 * Specify additional file extensions to be recognized as downloads
                 *
                 * @param string extensions
                 */
                addDownloadExtensions: function (extensions) {
                    configDownloadExtensions += '|' + extensions;
                },

                /**
                 * Set array of domains to be treated as local
                 *
                 * @param string|array hostsAlias
                 */
                setDomains: function (hostsAlias) {
                    configHostsAlias = isString(hostsAlias) ? [hostsAlias] : hostsAlias;
                    configHostsAlias.push(domainAlias);
                },

                /**
                 * Set array of classes to be ignored if present in link
                 *
                 * @param string|array ignoreClasses
                 */
                setIgnoreClasses: function (ignoreClasses) {
                    configIgnoreClasses = isString(ignoreClasses) ? [ignoreClasses] : ignoreClasses;
                },

                /**
                 * Set request method
                 *
                 * @param string method GET or POST; default is GET
                 */
                setRequestMethod: function (method) {
                    configRequestMethod = method || 'GET';
                },

                /**
                 * Override referrer
                 *
                 * @param string url
                 */
                setReferrerUrl: function (url) {
                    configReferrerUrl = url;
                },

                /**
                 * Override url
                 *
                 * @param string url
                 */
                setCustomUrl: function (url) {
                    configCustomUrl = resolveRelativeReference(locationHrefAlias, url);
                },

                /**
                 * Override document.title
                 *
                 * @param string title
                 */
                setDocumentTitle: function (title) {
                    configTitle = title;
                },

                /**
                 * Set the URL of the Piwik API. It is used for Page Overlay.
                 * This method should only be called when the API URL differs from the tracker URL.
                 *
                 * @param string apiUrl
                 */
                setAPIUrl: function (apiUrl) {
                    configApiUrl = apiUrl;
                },

                /**
                 * Set array of classes to be treated as downloads
                 *
                 * @param string|array downloadClasses
                 */
                setDownloadClasses: function (downloadClasses) {
                    configDownloadClasses = isString(downloadClasses) ? [downloadClasses] : downloadClasses;
                },

                /**
                 * Set array of classes to be treated as outlinks
                 *
                 * @param string|array linkClasses
                 */
                setLinkClasses: function (linkClasses) {
                    configLinkClasses = isString(linkClasses) ? [linkClasses] : linkClasses;
                },

                /**
                 * Set array of campaign name parameters
                 *
                 * @see http://piwik.org/faq/how-to/#faq_120
                 * @param string|array campaignNames
                 */
                setCampaignNameKey: function (campaignNames) {
                    configCampaignNameParameters = isString(campaignNames) ? [campaignNames] : campaignNames;
                },

                /**
                 * Set array of campaign keyword parameters
                 *
                 * @see http://piwik.org/faq/how-to/#faq_120
                 * @param string|array campaignKeywords
                 */
                setCampaignKeywordKey: function (campaignKeywords) {
                    configCampaignKeywordParameters = isString(campaignKeywords) ? [campaignKeywords] : campaignKeywords;
                },

                /**
                 * Strip hash tag (or anchor) from URL
                 * Note: this can be done in the Piwik>Settings>Websites on a per-website basis
                 *
                 * @deprecated
                 * @param bool enableFilter
                 */
                discardHashTag: function (enableFilter) {
                    configDiscardHashTag = enableFilter;
                },

                /**
                 * Set first-party cookie name prefix
                 *
                 * @param string cookieNamePrefix
                 */
                setCookieNamePrefix: function (cookieNamePrefix) {
                    configCookieNamePrefix = cookieNamePrefix;
                    // Re-init the Custom Variables cookie
                    customVariables = getCustomVariablesFromCookie();
                },

                /**
                 * Set first-party cookie domain
                 *
                 * @param string domain
                 */
                setCookieDomain: function (domain) {
                    configCookieDomain = domainFixup(domain);
                    updateDomainHash();
                },

                /**
                 * Set first-party cookie path
                 *
                 * @param string domain
                 */
                setCookiePath: function (path) {
                    configCookiePath = path;
                    updateDomainHash();
                },

                /**
                 * Set visitor cookie timeout (in seconds)
                 *
                 * @param int timeout
                 */
                setVisitorCookieTimeout: function (timeout) {
                    configVisitorCookieTimeout = timeout * 1000;
                },

                /**
                 * Set session cookie timeout (in seconds)
                 *
                 * @param int timeout
                 */
                setSessionCookieTimeout: function (timeout) {
                    configSessionCookieTimeout = timeout * 1000;
                },

                /**
                 * Set referral cookie timeout (in seconds)
                 *
                 * @param int timeout
                 */
                setReferralCookieTimeout: function (timeout) {
                    configReferralCookieTimeout = timeout * 1000;
                },

                /**
                 * Set conversion attribution to first referrer and campaign
                 *
                 * @param bool if true, use first referrer (and first campaign)
                 *             if false, use the last referrer (or campaign)
                 */
                setConversionAttributionFirstReferrer: function (enable) {
                    configConversionAttributionFirstReferrer = enable;
                },

                /**
                 * Disables all cookies from being set
                 *
                 * Existing cookies will be deleted on the next call to track
                 */
                disableCookies: function () {
                    configCookiesDisabled = true;
                    browserFeatures.cookie = '0';
                },

                /**
                 * One off cookies clearing. Useful to call this when you know for sure a new visitor is using the same browser,
                 * it maybe helps to "reset" tracking cookies to prevent data reuse for different users.
                 */
                deleteCookies: function () {
                    deleteCookies();
                },

                /**
                 * Handle do-not-track requests
                 *
                 * @param bool enable If true, don't track if user agent sends 'do-not-track' header
                 */
                setDoNotTrack: function (enable) {
                    var dnt = navigatorAlias.doNotTrack || navigatorAlias.msDoNotTrack;
                    configDoNotTrack = enable && (dnt === 'yes' || dnt === '1');

                    // do not track also disables cookies and deletes existing cookies
                    if (configDoNotTrack) {
                        this.disableCookies();
                    }
                },

                /**
                 * Add click listener to a specific link element.
                 * When clicked, Piwik will log the click automatically.
                 *
                 * @param DOMElement element
                 * @param bool enable If true, use pseudo click-handler (mousedown+mouseup)
                 */
                addListener: function (element, enable) {
                    addClickListener(element, enable);
                },

                /**
                 * Install link tracker
                 *
                 * The default behaviour is to use actual click events. However, some browsers
                 * (e.g., Firefox, Opera, and Konqueror) don't generate click events for the middle mouse button.
                 *
                 * To capture more "clicks", the pseudo click-handler uses mousedown + mouseup events.
                 * This is not industry standard and is vulnerable to false positives (e.g., drag events).
                 *
                 * There is a Safari/Chrome/Webkit bug that prevents tracking requests from being sent
                 * by either click handler.  The workaround is to set a target attribute (which can't
                 * be "_self", "_top", or "_parent").
                 *
                 * @see https://bugs.webkit.org/show_bug.cgi?id=54783
                 *
                 * @param bool enable If true, use pseudo click-handler (mousedown+mouseup)
                 */
                enableLinkTracking: function (enable) {
                    if (hasLoaded) {
                        // the load event has already fired, add the click listeners now
                        addClickListeners(enable);
                    } else {
                        // defer until page has loaded
                        registeredOnLoadHandlers.push(function () {
                            addClickListeners(enable);
                        });
                    }
                },

                /**
                 * Disable automatic performance tracking
                 */
                disablePerformanceTracking: function () {
                    configPerformanceTrackingEnabled = false;
                },

                /**
                 * Set the server generation time.
                 * If set, the browser's performance.timing API in not used anymore to determine the time.
                 * 
                 * @param int generationTime
                 */
                setGenerationTimeMs: function (generationTime) {
                    configPerformanceGenerationTime = parseInt(generationTime, 10);
                },

                /**
                 * Set heartbeat (in seconds)
                 *
                 * @param int minimumVisitLength
                 * @param int heartBeatDelay
                 */
                setHeartBeatTimer: function (minimumVisitLength, heartBeatDelay) {
                    var now = new Date();

                    configMinimumVisitTime = now.getTime() + minimumVisitLength * 1000;
                    configHeartBeatTimer = heartBeatDelay * 1000;
                },

                /**
                 * Frame buster
                 */
                killFrame: function () {
                    if (windowAlias.location !== windowAlias.top.location) {
                        windowAlias.top.location = windowAlias.location;
                    }
                },

                /**
                 * Redirect if browsing offline (aka file: buster)
                 *
                 * @param string url Redirect to this URL
                 */
                redirectFile: function (url) {
                    if (windowAlias.location.protocol === 'file:') {
                        windowAlias.location = url;
                    }
                },

                /**
                 * Count sites in pre-rendered state
                 *
                 * @param bool enable If true, track when in pre-rendered state
                 */
                setCountPreRendered: function (enable) {
                    configCountPreRendered = enable;
                },

                /**
                 * Trigger a goal
                 *
                 * @param int|string idGoal
                 * @param int|float customRevenue
                 * @param mixed customData
                 */
                trackGoal: function (idGoal, customRevenue, customData) {
                    trackCallback(function () {
                        logGoal(idGoal, customRevenue, customData);
                    });
                },

                /**
                 * Manually log a click from your own code
                 *
                 * @param string sourceUrl
                 * @param string linkType
                 * @param mixed customData
                 */
                trackLink: function (sourceUrl, linkType, customData) {
                    trackCallback(function () {
                        logLink(sourceUrl, linkType, customData);
                    });
                },

                /**
                 * Log visit to this page
                 *
                 * @param string customTitle
                 * @param mixed customData
                 */
                trackPageView: function (customTitle, customData) {
                    if (isOverlaySession(configTrackerSiteId)) {
                        trackCallback(function () {
                            injectOverlayScripts(configTrackerUrl, configApiUrl, configTrackerSiteId);
                        });
                    } else {
                        trackCallback(function () {
                            logPageView(customTitle, customData);
                        });
                    }
                },

                /**
                 * Records an event
                 *
                 * @param string category The Event Category (Videos, Music, Games...)
                 * @param string action The Event's Action (Play, Pause, Duration, Add Playlist, Downloaded, Clicked...)
                 * @param string name (optional) The Event's object Name (a particular Movie name, or Song name, or File name...)
                 * @param float value (optional) The Event's value
                 */
                trackEvent: function (category, action, name, value) {
                    trackCallback(function () {
                        logEvent(category, action, name, value);
                    });
                },

                /**
                 * Log special pageview: Internal search
                 *
                 * @param string customTitle
                 * @param mixed customData
                 */
                trackSiteSearch: function (keyword, category, resultsCount) {
                    trackCallback(function () {
                        logSiteSearch(keyword, category, resultsCount);
                    });
                },


                /**
                 * Used to record that the current page view is an item (product) page view, or a Ecommerce Category page view.
                 * This must be called before trackPageView() on the product/category page.
                 * It will set 3 custom variables of scope "page" with the SKU, Name and Category for this page view.
                 * Note: Custom Variables of scope "page" slots 3, 4 and 5 will be used.
                 *
                 * On a category page, you can set the parameter category, and set the other parameters to empty string or false
                 *
                 * Tracking Product/Category page views will allow Piwik to report on Product & Categories
                 * conversion rates (Conversion rate = Ecommerce orders containing this product or category / Visits to the product or category)
                 *
                 * @param string sku Item's SKU code being viewed
                 * @param string name Item's Name being viewed
                 * @param string category Category page being viewed. On an Item's page, this is the item's category
                 * @param float price Item's display price, not use in standard Piwik reports, but output in API product reports.
                 */
                setEcommerceView: function (sku, name, category, price) {
                    if (!isDefined(category) || !category.length) {
                        category = "";
                    } else if (category instanceof Array) {
                        category = JSON2.stringify(category);
                    }

                    customVariablesPage[5] = ['_pkc', category];

                    if (isDefined(price) && String(price).length) {
                        customVariablesPage[2] = ['_pkp', price];
                    }

                    // On a category page, do not track Product name not defined
                    if ((!isDefined(sku) || !sku.length)
                            && (!isDefined(name) || !name.length)) {
                        return;
                    }

                    if (isDefined(sku) && sku.length) {
                        customVariablesPage[3] = ['_pks', sku];
                    }

                    if (!isDefined(name) || !name.length) {
                        name = "";
                    }

                    customVariablesPage[4] = ['_pkn', name];
                },

                /**
                 * Adds an item (product) that is in the current Cart or in the Ecommerce order.
                 * This function is called for every item (product) in the Cart or the Order.
                 * The only required parameter is sku.
                 *
                 * @param string sku (required) Item's SKU Code. This is the unique identifier for the product.
                 * @param string name (optional) Item's name
                 * @param string name (optional) Item's category, or array of up to 5 categories
                 * @param float price (optional) Item's price. If not specified, will default to 0
                 * @param float quantity (optional) Item's quantity. If not specified, will default to 1
                 */
                addEcommerceItem: function (sku, name, category, price, quantity) {
                    if (sku.length) {
                        ecommerceItems[sku] = [ sku, name, category, price, quantity ];
                    }
                },

                /**
                 * Tracks an Ecommerce order.
                 * If the Ecommerce order contains items (products), you must call first the addEcommerceItem() for each item in the order.
                 * All revenues (grandTotal, subTotal, tax, shipping, discount) will be individually summed and reported in Piwik reports.
                 * Parameters orderId and grandTotal are required. For others, you can set to false if you don't need to specify them.
                 *
                 * @param string|int orderId (required) Unique Order ID.
                 *                   This will be used to count this order only once in the event the order page is reloaded several times.
                 *                   orderId must be unique for each transaction, even on different days, or the transaction will not be recorded by Piwik.
                 * @param float grandTotal (required) Grand Total revenue of the transaction (including tax, shipping, etc.)
                 * @param float subTotal (optional) Sub total amount, typically the sum of items prices for all items in this order (before Tax and Shipping costs are applied)
                 * @param float tax (optional) Tax amount for this order
                 * @param float shipping (optional) Shipping amount for this order
                 * @param float discount (optional) Discounted amount in this order
                 */
                trackEcommerceOrder: function (orderId, grandTotal, subTotal, tax, shipping, discount) {
                    logEcommerceOrder(orderId, grandTotal, subTotal, tax, shipping, discount);
                },

                /**
                 * Tracks a Cart Update (add item, remove item, update item).
                 * On every Cart update, you must call addEcommerceItem() for each item (product) in the cart, including the items that haven't been updated since the last cart update.
                 * Then you can call this function with the Cart grandTotal (typically the sum of all items' prices)
                 *
                 * @param float grandTotal (required) Items (products) amount in the Cart
                 */
                trackEcommerceCartUpdate: function (grandTotal) {
                    logEcommerceCartUpdate(grandTotal);
                }

            };
        }

        /************************************************************
         * Proxy object
         * - this allows the caller to continue push()'ing to _paq
         *   after the Tracker has been initialized and loaded
         ************************************************************/

        function TrackerProxy() {
            return {
                push: apply
            };
        }

        /************************************************************
         * Constructor
         ************************************************************/

        // initialize the Piwik singleton
        addEventListener(windowAlias, 'beforeunload', beforeUnloadHandler, false);
        addReadyListener();

        Date.prototype.getTimeAlias = Date.prototype.getTime;

        asyncTracker = new Tracker();

        // find the call to setTrackerUrl or setSiteid (if any) and call them first
        for (iterator = 0; iterator < _paq.length; iterator++) {
            if (_paq[iterator][0] === 'setTrackerUrl'
                    || _paq[iterator][0] === 'setSiteId') {
                apply(_paq[iterator]);
                delete _paq[iterator];
            }
        }

        // apply the queue of actions
        for (iterator = 0; iterator < _paq.length; iterator++) {
            if (_paq[iterator]) {
                apply(_paq[iterator]);
            }
        }

        // replace initialization array with proxy object
        _paq = new TrackerProxy();

        /************************************************************
         * Public data and methods
         ************************************************************/

        Piwik = {
            /**
             * Add plugin
             *
             * @param string pluginName
             * @param Object pluginObj
             */
            addPlugin: function (pluginName, pluginObj) {
                plugins[pluginName] = pluginObj;
            },

            /**
             * Get Tracker (factory method)
             *
             * @param string piwikUrl
             * @param int|string siteId
             * @return Tracker
             */
            getTracker: function (piwikUrl, siteId) {
                return new Tracker(piwikUrl, siteId);
            },

            /**
             * Get internal asynchronous tracker object
             *
             * @return Tracker
             */
            getAsyncTracker: function () {
                return asyncTracker;
            }
        };

        // Expose Piwik as an AMD module
        if (typeof define === 'function' && define.amd) {
            define('piwik', [], function () { return Piwik; });
        }

        return Piwik;
    }());
}

/************************************************************
 * Deprecated functionality below
 * - for legacy piwik.js compatibility
 ************************************************************/

/*
 * Piwik globals
 *
 *   var piwik_install_tracker, piwik_tracker_pause, piwik_download_extensions, piwik_hosts_alias, piwik_ignore_classes;
 */
/*global piwik_log:true */
/*global piwik_track:true */

/**
 * Track page visit
 *
 * @param string documentTitle
 * @param int|string siteId
 * @param string piwikUrl
 * @param mixed customData
 */
if (typeof piwik_log !== 'function') {
    piwik_log = function (documentTitle, siteId, piwikUrl, customData) {
        'use strict';

        function getOption(optionName) {
            try {
                return eval('piwik_' + optionName);
            } catch (ignore) { }

            return; // undefined
        }

        // instantiate the tracker
        var option,
            piwikTracker = Piwik.getTracker(piwikUrl, siteId);

        // initialize tracker
        piwikTracker.setDocumentTitle(documentTitle);
        piwikTracker.setCustomData(customData);

        // handle Piwik globals
        option = getOption('tracker_pause');

        if (option) {
            piwikTracker.setLinkTrackingTimer(option);
        }

        option = getOption('download_extensions');

        if (option) {
            piwikTracker.setDownloadExtensions(option);
        }

        option = getOption('hosts_alias');

        if (option) {
            piwikTracker.setDomains(option);
        }

        option = getOption('ignore_classes');

        if (option) {
            piwikTracker.setIgnoreClasses(option);
        }

        // track this page view
        piwikTracker.trackPageView();

        // default is to install the link tracker
        if (getOption('install_tracker')) {

            /**
             * Track click manually (function is defined below)
             *
             * @param string sourceUrl
             * @param int|string siteId
             * @param string piwikUrl
             * @param string linkType
             */
            piwik_track = function (sourceUrl, siteId, piwikUrl, linkType) {
                piwikTracker.setSiteId(siteId);
                piwikTracker.setTrackerUrl(piwikUrl);
                piwikTracker.trackLink(sourceUrl, linkType);
            };

            // set-up link tracking
            piwikTracker.enableLinkTracking();
        }
    };
}
