var blank = new Image();
blank.src = 'images/blank.gif';

$(document).ready(function() {
  var badBrowser = (/MSIE ((5\.5)|6)/.test(navigator.userAgent) && navigator.platform == "Win32");
  if (badBrowser) {
    // get all pngs on page
    $('img[src$=.png]').each(function() {
      if (!this.complete) {
        this.onload = function() { fixPng(this) };
      } else {
        fixPng(this);
      }
    });
  }
});

function fixPng(png) {
	// get src
	var src = png.src;
	// set width and height
	if (!png.style.width) { png.style.width = $(png).width(); }
	if (!png.style.height) { png.style.height = $(png).height(); }
	// replace by blank image
	png.onload = function() { };
	png.src = blank.src;
	// set filter (display original image)
	png.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "',sizingMethod='scale')";
}