function popup_demo_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=no,width=' + width + ',height=' + height + '' );
      popup.focus();
    }