function omnitureCompare()
  {
        s.linkTrackVars= 'event6';
        s.event6 =  'GLOBAL:Compare-Products Added';
        s.tl(this,'o', 'similiar_products.jsp');
 }
 function getCompareKeys() {
     var addToCompareLocation= "";
     var compareCheckBoxes = document.getElementsByName('cartid');
     for (var i=0; i<compareCheckBoxes.length; i++) {
       if (compareCheckBoxes[i].checked == true) {  //TODO adding the checked compare 
         var value = compareCheckBoxes[i].value;
         addToCompareLocation += "&compareKey=" + escape(value);
         omnitureCompare();  
       }
       else
       {
          //TODO: add to keys to remove from compare
          var delValue = compareCheckBoxes[i].value;
          addToCompareLocation += "&delKey=" + escape(delValue);
       }
     }
     return addToCompareLocation;
   }