//	This javascript tags file downloads and external links in Google Analytics.
//	You need to be using the Google Analytics New Tracking Code (ga.js) 
//	for this script to work.
//	To use, place this file on all pages just above the Google Analytics tracking code.
//	All outbound links and links to non-html files should now be automatically tracked.
					
// This is going in the header. Using jQuery's document ready to delay execution of code until DOM loads.								
jQuery(function ($) {

	if (document.getElementsByTagName) {
	        // Initialize external link handlers
	        var hrefs = document.getElementsByTagName("a");
	        for (var l = 0; l < hrefs.length; l++) {
					// try {} catch{} block added by erikvold VKI
				try{
		                //protocol, host, hostname, port, pathname, search, hash
		                if (hrefs[l].protocol == "mailto:") {
		                        startListening(hrefs[l],"click",trackMailto);
		                } else if (hrefs[l].hostname == location.host) {
		                        var path = hrefs[l].pathname + hrefs[l].search;
								var isDoc = path.match(/\.(?:doc|docx|eps|jpg|png|ppt|pdf|xls|xlsx|zip|txt|vsd|vxd|js|css|rar|exe|wma|mov|avi|wmv|mp3)($|\&|\?)/);
		                        if (isDoc) {
		                                startListening(hrefs[l],"click",trackExternalLinks);
		                        }
		                } else {
		                        startListening(hrefs[l],"click",trackExternalLinks);
		                }
				}
				catch(e){
						continue;
				}
	        }
	}

	function startListening (obj,evnt,func) {
	        if (obj.addEventListener) {
	                obj.addEventListener(evnt,func,false);
	        } else if (obj.attachEvent) {
	                obj.attachEvent("on" + evnt,func);
	        }
	}

	function trackMailto (evnt) {
	        var href = (evnt.srcElement) ? evnt.srcElement.href : this.href;
	        var mailto = "/mailto/" + href.substring(7);
	        if (typeof(_gaq) == "object") _gaq.push(['_trackPageview', (mailto)]);
	}

	function trackExternalLinks (evnt) {
	        var e = (evnt.srcElement) ? evnt.srcElement : this;
	        while (e.tagName != "A") {
	                e = e.parentNode;
	        }
	        var lnk = (e.pathname.charAt(0) == "/") ? e.pathname : "/" + e.pathname;
	        if (e.search && e.pathname.indexOf(e.search) == -1) lnk += e.search;
	        if (e.hostname != location.host) lnk = "/external/" + e.hostname + lnk;
	        if (typeof(_gaq) == "object") _gaq.push(['_trackPageview', (lnk)]); 
	}
	
	// catch buttons that weren't there when the page loaded
	jQuery('body').delegate('#IX_of-viewport a.button', 'click', trackExternalLinks);
	
});