var LinkTrack = function () {
  this.docLinks  = document.links;
  this.location= location.pathname;
}

LinkTrack.prototype.updateHrefs = function () {
  var currlink, hostname, protocol, linktext;
  if (!(!document.getElementsByTagName && document.all)) {
    for (var i=0; i<this.docLinks.length; i++) {
      currlink = this.docLinks[i];
      hostname = currlink.hostname ? currlink.hostname.toLowerCase() : ""; 
      protocol = currlink.protocol.toLowerCase();
      linktext = currlink.innerText;
      if (protocol == 'http:' && hostname != location.hostname.toLowerCase()) {
        currlink.href = this.getNewUrl(currlink.href);
        if (document.all && currlink.innerText.toLowerCase() == currlink.href.toLowerCase()) currlink.innerText = linktext;
      }
    }
  }
}

LinkTrack.prototype.getNewUrl = function (destination) {
  var newUrl = '/JumpTo.aspx?URL=';
  newUrl += destination;
  return newUrl;
}

var myC = new LinkTrack();
myC.updateHrefs();