// 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 script has been provided by Goodwebpractices.com
// Thanks to ShoreTel, MerryMan and Colm McBarron
//
// www.goodwebpractices.com
// VKI has made changes as indicated below.
// Virante has made changes to accomodate async tracking script & Categories Events based on 
// file type. www.virante.com


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|xls|xlsx|ppt|pdf|zip|txt|vsd|vxd|rar|exe|tar|gz)($|\&|\?)/);
        var isImg = path.match(/\.(?:gif|eps|jpg|png|svg|bmp|jpeg|psd|tiff)($|\&|\?)/);
        var isMov = path.match(/\.(?:wma|mov|avi|wmv|mp4|webm|flv)($|\&|\?)/);
        var isMus = path.match(/\.(?:mp3|m4a|wav|aac|ogg)($|\&|\?)/);
        var isSys = path.match(/\.(?:js|css|xml)($|\&|\?)/);    
        
        if (isDoc) {
          startListening(hrefs[l],"click",trackDocumentLinks);
        } else if (isImg) {
          startListening(hrefs[l],"click",trackImageLinks);
        } else if (isMov) {
          startListening(hrefs[l],"click",trackMovieLinks);
        } else if (isMus) {
          startListening(hrefs[l],"click",trackMusicLinks);
        } else if (isSys) {
          startListening(hrefs[l],"click",trackSystemLinks);
        }
      }
      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(['_trackEvent', 'Mailto', mailto]);
}

function trackDocumentLinks (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 (typeof(_gaq) == "object") _gaq.push(['_trackEvent', 'Document Download', lnk]);
}

function trackImageLinks (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 (typeof(_gaq) == "object") _gaq.push(['_trackEvent', 'Image Download', lnk]);
}

function trackMovieLinks (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 (typeof(_gaq) == "object") _gaq.push(['_trackEvent', 'Movie Download', lnk]);
}

function trackMusicLinks (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 (typeof(_gaq) == "object") _gaq.push(['_trackEvent', 'Music Download', lnk]);
}

function trackSystemLinks (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 (typeof(_gaq) == "object") _gaq.push(['_trackEvent', 'System File Download', lnk]);
}

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 = e.hostname + lnk;
  if (typeof(_gaq) == "object") _gaq.push(['_trackEvent', 'External Link', lnk]);
}