piwik.js

/*!
 * 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, 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,
    doNotTrack, setDoNotTrack, msDoNotTrack,
    addListener, enableLinkTracking, setLinkTrackingTimer,
    setHeartBeatTimer, killFrame, redirectFile, setCountPreRendered,
    trackGoal, trackLink, trackPageView, trackSiteSearch,
    setEcommerceView, addEcommerceItem, trackEcommerceOrder, trackEcommerceCartUpdate
 */
/*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 */
            i,

            /* 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) {
            // scheme : // [username [: password] @] hostame [: port] [/ [path] [? query] [# fragment]]
            var e = new RegExp('^(?:https?|ftp)(?::/*(?:[^?]+)[?])([^#]+)'),
                matches = e.exec(url),
                f = new RegExp('(?:^|&)' + name + '=([^&]*)'),
                result = matches ? f.exec(matches[1]) : 0;

            return result ? decodeWrapper(result[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 str = '',
                        i,
                        v;

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

                    return str;
                },

                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';