// javascript function to take the query string and return
// a required parm


function getValueForParm(parm)
{
     var queryPairs = (location.href.split("?"))[1].split("&");
     for (var i =0;i < queryPairs.length; i++)
     {
          var parmValue = queryPairs[i].split("=");
          if (parmValue[0] == parm)
          {
               return parmValue[1];
          }    
     }
     return "";
}