function getQueryParamValue(param){
   var q = document.location.search || document.location.hash; if(q){
   var startIndex = q.indexOf(param +"=");
   var endIndex = (q.indexOf("&", startIndex) > -1) ? q.indexOf("&", startIndex) : q.length;
   if (q.length > 1 && startIndex > -1) {
     return q.substring(q.indexOf("=", startIndex)+1, endIndex);
     }
    }
   return "";
 }