function popup_window( url, id, width, height )
{
   //extract the url parameters if any, and pass them to the called html
   var tempvar=document.location.toString(); // fetch the URL string
   var passedparams = tempvar.lastIndexOf("?");
   if(passedparams > -1)
      url += tempvar.substring(passedparams);
  popup = window.open( url, id, 'toolbar=no,scrollbars=no,location=no,statusbar=no,menubar=no,resizable=yes,width=' + width + ',height=' + height + '' );
  popup.focus();
}