function popImage(file_name, file_title, file_width, file_height)
{
  if (parseInt(navigator.appVersion.charAt(0)) >= 4)
  {
    var optBrowser='scrollbars=yes,width='+file_width+',height='+file_height+',toolbar=no,menubar=no,location=no,resize=1,resizable=0';
    var imgWin=window.open('about:blank','',optBrowser); 
    with (imgWin.document)
    {
      writeln('<html><head><title>Loading...</title>');
      writeln('<style>body{margin:0;padding:0;text-align:center;} img{border:0px;}</style>');
      writeln('</head>');
      writeln('<sc'+'ript>');
      writeln('function doTitle(){document.title="'+file_title+'";}');
      writeln('</sc'+'ript>');
      writeln('<body onload="self.focus();doTitle()">');
      writeln('<a href="javascript:window.close()"><img src="'+file_name+'" width="'+file_width+'" height="'+file_height+'" alt="'+file_title+'"/></a>');
      writeln('</body></html>');
      close();
    }
  }
}
