piwik.js

/*!
 * Piwik - Web Analytics
 *
 * JavaScript tracking client
 *
 * @link http://piwik.org
 * @source http://dev.piwik.org/trac/browser/trunk/js/piwik.js
 * @license http://www.opensource.org/licenses/bsd-license.php Simplified BSD
 */

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

/*
 * Browser [In]Compatibility
 *
 * This version of piwik.js is known to not work with:
 * - IE4 - try..catch and for..in introduced in IE5
 * - IE5 - named anonymous functions, array.push, encodeURIComponent, and decodeURIComponent introduced in IE5.5
 */

/************************************************************
 * JSON - public domain reference implementation by Douglas Crockford
 * @link http://www.JSON.org/json2.js
 *
 * Modifications against json2.js 2011-01-18:
 * - handle case JSON already defined (e.g., ECMAScript 5)
 * - use new RegExp(pattern) instead of /pattern/ for greater portability
 ************************************************************/
/*jslint evil: true, strict: true, regexp: false */
if (!this.JSON) {
    this.JSON = {};
}

(function () {
    "use strict";

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

    if (typeof Date.prototype.toJSON !== 'function') {

        Date.prototype.toJSON = function (key) {

            return isFinite(this.valueOf()) ?
                this.getUTCFullYear()     + '-' +
                f(this.getUTCMonth() + 1) + '-' +
                f(this.getUTCDate())      + 'T' +
                f(this.getUTCHours())     + ':' +
                f(this.getUTCMinutes())   + ':' +
                f(this.getUTCSeconds())   + 'Z' : null;
        };

        String.prototype.toJSON      =
            Number.prototype.toJSON  =
            Boolean.prototype.toJSON = function (key) {
                return this.valueOf();
            };
    }

    var cx = new RegExp("[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]", 'g'),
        escapable = new RegExp("[\\\\\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]", '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' &&
                typeof value.toJSON === 'function') {
            value = value.toJSON(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) {
                    k = rep[i];
                    if (typeof k === 'string') {
                        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.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 JSON.stringify !== 'function') {
        JSON.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('JSON.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 JSON.parse !== 'function') {
        JSON.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.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('JSON.parse');
        };
    }
}());
/************************************************************
 * end JSON
 ************************************************************/

/*jslint browser:true, forin:true, plusplus:false, onevar:false, strict:true, evil:true */
/*global window unescape ActiveXObject _paq:true */
var
	// asynchronous tracker (or proxy)
	_paq = _paq || [],

	// Piwik singleton and namespace
	Piwik =	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,

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

			/*
			 * encode
			 */
			encodeWrapper = windowAlias.encodeURIComponent,

			/*
			 * decode
			 */
			decodeWrapper = windowAlias.decodeURIComponent,

			/* asynchronous tracker */
			asyncTracker,

			/* iterator */
			i;

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

		/*
		 * Is property defined?
		 */
		function isDefined(property) {
			return typeof property !== '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(parameterArray) {
			var 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) {
				pluginMethod = plugins[i][methodName];
				if (isFunction(pluginMethod)) {
					result += pluginMethod(callback);
				}
			}

			return result;
		}

		/*
		 * Handle beforeunload event
		 */
		function beforeUnloadHandler() {
			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) { }
				var now;

				do {
					now = new Date();
				} while (now.getTime() < 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() {
			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 === top) {
					(function ready() {
						if (!hasLoaded) {
							try {
								documentAlias.documentElement.doScroll('left');
							} catch (error) {
								setTimeout(ready, 0);
								return;
							}
							loadHandler();
						}
					}());
				}
			}
			// fallback
			addEventListener(windowAlias, 'load', loadHandler, false);
		}

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

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

			return referrer;
		}

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

			return result ? decodeWrapper(result[1]) : '';
		}

		/*
		 * Set cookie value
		 */
		function setCookie(cookieName, value, msToExpire, path, domain, secure) {
			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 ? path : '/') +
				(domain ? ';domain=' + domain : '') +
				(secure ? ';secure' : '');
		}

		/*
		 * Get cookie value
		 */
		function getCookie(cookieName) {
			var cookiePattern = new RegExp('(^|;)[ ]*' + cookieName + '=([^;]*)'),

				cookieMatch = cookiePattern.exec(documentAlias.cookie);

			return cookieMatch ? decodeWrapper(cookieMatch[2]) : 0;
		}
		
		/*
		 * UTF-8 encoding
		 */
		function utf8_encode(argString) {
			return unescape(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 === 'webcache.googleusercontent.com' ||			// Google
					hostName === 'cc.bingj.com' ||							// Bing
					hostName.substring(0, 5) === '74.6.') {					// Yahoo (via Inktomi 74.6.0.0/16)
				href = documentAlias.links[0].href;
				hostName = getHostName(href);
			} else if (hostName === 'translate.googleusercontent.com') {	// Google
				if (referrer === '') {
					referrer = href;
				}
				href = getParameter(href, 'u');
				hostName = getHostName(href);
			}
			return [hostName, href, referrer];
		}

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

			return (domain.charAt(--dl) === '.') ? domain.substring(0, dl) : domain;
		}

		/*
		 * 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 || '',

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

				// Document URL
				configCustomUrl,

				// Document title
				configTitle = documentAlias.title,

				// Extensions to be treated as download links
				configDownloadExtensions = '7z|aac|ar[cj]|as[fx]|avi|bin|csv|deb|dmg|doc|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|ppt|qtm?|ra[mr]?|rpm|sea|sit|tar|t?bz2?|tgz|torrent|txt|wav|wm[av]|wpd||xls|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,

				// 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,

				// Do Not Track
				configDoNotTrack,

				// 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

				// Custom Variables read from cookie
				customVariables = false,

				// Custom Variables names and values are each truncated before being sent in the request or recorded in the cookie
				customVariableMaximumLength = 100,
			
				// Client-side data collection
				browserHasCookies = '0',

				// Plugin, Parameter name, MIME type, detected
				pluginMap = {
					// document types
					pdf:         ['pdf',   'application/pdf',               '0'],
					// media players
					quicktime:   ['qt',    'video/quicktime',               '0'],
					realplayer:  ['realp', 'audio/x-pn-realaudio-plugin',   '0'],
					wma:         ['wma',   'application/x-mplayer2',        '0'],
					// interactive multimedia 
					director:    ['dir',   'application/x-director',        '0'],
					flash:       ['fla',   'application/x-shockwave-flash', '0'],
					// RIA
					java:        ['java',  'application/x-java-vm',         '0'],
					gears:       ['gears', 'application/x-googlegears',     '0'],
					silverlight: ['ag',    'application/x-silverlight',     '0']
				},

				// 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,

				// Visitor ID
				visitorId,

				// Hash function
				hash = sha1,

				// Domain hash value
				domainHash;

			/*
			 * Purify URL.
			 */
			function purify(str) {
				var targetPattern;

				if (configDiscardHashTag) {
					targetPattern = new RegExp('#.*');
					return str.replace(targetPattern, '');
				}
				return str;
			}

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

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

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

					if (alias.substring(0, 2) === '*.') {
						if (hostName === alias.substring(2)) {
							return true;
						}

						offset = hostName.length - alias.length + 1;
						if ((offset > 0) && (hostName.substring(offset) === alias.substring(1))) {
							return true;
						}
					}
				}
				return false;
			}

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

				image.onLoad = function () { };