function popUpImg(img) {
   myImg = new Image();
   myImg.src = img;
   var width = myImg.width;
   var height = myImg.height;
   imgWin = window.open('', 'imgWinName', 'width=' + width + ', height=' + height);
 
   with (imgWin.document) {
      open();
      write('<HTML>');
      write(' <HEAD>');
      write(' <title>imgWin</title>');
      write(' </HEAD>');
      write(' <BODY style="margin: 0px;" onLoad="self.focus();">');
      write(' <a href="" onClick="JavaScript:self.close()">')
      write(' <img src="' + img + '" alt="popUpImage" title="popUpImage" border="0"></a>');
      write(' </BODY>');
      write('</HTML>');
      close();
   }
} 
