function msieversion()
{
//alert(window.navigator.userAgent);
   var ua = window.navigator.userAgent;
   var msie = ua.indexOf ( "MSIE " );

   if ( msie > 0 )
   {
      return parseInt (ua.substring (msie+5, ua.indexOf (".", msie )));
   }
   else
   {
      return 0;
   }
}