function redirect(url)
   {
       strID = window.document.location.toString();
       intLen = strID.indexOf('?');
       if(intLen==-1)
       {
            location.href=url; 
       }
       else
       {
            strID = strID.substring(intLen,(strID.length)); 
            location.href=url+strID;
       }
   }