(function ($) {
  if (!$) return;
  $.fn.extend({
    fixPNG: function(sizingMethod, forceBG) {
      if (!($.browser.msie)) return this;
      var emptyimg = './img/empty.gif'; //Path to empty 1x1px GIF goes here
      sizingMethod = sizingMethod || 'scale'; //sizingMethod, defaults to scale (matches image dimensions)
      this.each(function() {
        var isImg = (forceBG) ? false : jQuery.nodeName(this, 'img'),
          imgname = (isImg) ? this.src : this.currentStyle.backgroundImage,
              src = (isImg) ? imgname : imgname.substring(5, imgname.length - 2);
        this.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="'+src+'", sizingMethod="'+sizingMethod+'")';
        if (isImg) this.src = emptyimg;
        else this.style.backgroundImage = 'url('+emptyimg+')';
      });
      return this;
    }
  });
})(jQuery);