ÿþ/**

 * _ftTrack v2.01 2010-10-28 Francesco Terenzani

 *

 * License: http://www.terenzani.it/toys/ga.link/license.txt

 * Project home page: http://www.terenzani.it/tracciare-link-con-google-analytics

 * Source: http://www.terenzani.it/toys/ga.link/ga.link.js

 * Minified: http://www.terenzani.it/toys/ga.link/ga.link.min.js

 */



function _ftTrack(pageTracker, args) {



	var options = args.split('|'), rules = [], i, length = options.length,

		examples = ga_link.rules, ext = [];



	for (i = 0; i < length; i++) {

		if (options[i] === 'link')

			rules.push(new examples.Outgoing);

		if (options[i] === 'email')

			rules.push(new examples.Email);

		else

			ext.push(options[i]);

	}



	if (ext.length)

		rules.push(new examples.MediaFile(ext));



	if (rules.length)

		ga_link.track(pageTracker, rules);



}



window.ga_link = (function(){



	function fixEvent(event){

		//IE doesn't pass in the event object

		event = event || window.event;



		//IE uses srcElement as the target

		if(!event.target)

			event.target = event.target || event.srcElement || document;



		return event;

	}



	// Is the clicked element an anchor or a child of an anchor?

	// If true return the anchor element

	function findA(element) {

		return element.tagName && element.tagName.toUpperCase() === 'A'?

			element : (!element.parentNode? false: findA(element.parentNode));



	}



	function addEvent(obj, type, func){

		if(obj.addEventListener)

			obj.addEventListener(type, func, false);



		else if(obj.attachEvent)

			obj.attachEvent("on" + type, func);

	}



	function track(pageTracker, rules) {

		addEvent(document, 'click', function(event) {

			var a = findA(fixEvent(event).target);

			if (a) {

				for (var i = 0, length = rules.length; i < length; i++) {

					if (rules[i].check(a, pageTracker))

						return;

				}

			}

		});



	}



	var rules = {



		Email: function() {},

		Outgoing: function() {},

		MediaFile: function(extensions) {

			this.regexp = new RegExp("(" + extensions.join('|') + ")(\\?.*)?$", "i");

		}



	}



	rules.Email.prototype.check = function (anchor, pageTracker) {

		if(/mailto/.test(anchor.protocol)){

			pageTracker._trackEvent("Mailto", "click", anchor.href.replace(/^mailto:/, ""));

			return true;

		}

	};



	rules.Outgoing.prototype.check = function (anchor, pageTracker) {

		if(/http/.test(anchor.protocol) && anchor.hostname != document.location.hostname){

			pageTracker._trackEvent("Outgoing", "click", anchor.href);

			return true;

		}

	};



	rules.MediaFile.prototype.check = function (anchor, pageTracker) {

		if(anchor.hostname == document.location.hostname && this.regexp.test(anchor.pathname)){

			pageTracker._trackEvent("Media", "click", anchor.pathname);

			return true;

		}

	};

	

	return {

		track: track,

		rules: rules

	};



})();