function openwin(name, w, h)
   {
      var actual_w = eval(w);
      var actual_h = eval(h);

      var attributes = 'width='+actual_w+',height='+actual_h+',menubar=no,scrollbars=no,resizable=no,left=100,top=50,screenX=100,screenY=50';
      window.open(name, '_blank', attributes);
   }