var blank = new Image();
var imgdir = "immagini/";

// Browser detection
var IE = (/MSIE ((5\.5)|6)/.test(navigator.userAgent) && navigator.platform == "Win32");


$(document).ready(function() {
  if (IE) {
    blank.src = imgdir + 'blank.gif';
    $('img[src$=.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')";
}