function showhighres(imagename)
{
      var widthx="640";
      var heighty="420";
      fmwin4=window.open(imagename,'HighResPicture','toolbar=no,status=no,width=' + widthx + ',height=' + heighty + ', left=3, top=3, directories=no,scrollbars=yes,location=no,resizable=yes,menubar=no');

}