ajaxpro get query string

function Request(strName)
    {
         var strHref = window.document.location.href;
         var intPos = strHref.indexOf("?");
         var strRight = strHref.substr(intPos + 1);

         var arrTmp = strRight.split("&");
         for(var i = 0; i < arrTmp.length; i++)
         {
          var arrTemp = arrTmp[i].split("=");

          if(arrTemp[0].toUpperCase() == strName.toUpperCase())
          {
            return arrTemp[1];
          }
         }
         return "";
    }