if (document.all && /MSIE (5\.5|6)/.test(navigator.userAgent) &&
  document.styleSheets && document.styleSheets[0] && document.styleSheets[0].addRule)
 {
  // SLOW --> //document.styleSheets[0].addRule('*', 'behavior: url(stylesheets/resources/iepngfix.htc)');
  // Feel free to add rules for specific elements only, as above.
  // You have to call this once for each selector, like so:
  document.styleSheets[0].addRule('.pngfix', 'behavior: url(/stylesheets/resources/iepngfix.htc)');
 }

 // Here's another script that disables all PNGs in IE when the page is printed.

 if (window.attachEvent && /MSIE (5\.5|6)/.test(navigator.userAgent))
 {
  function printPNGFix(disable)
  {
   for (var  i = 0; i < document.all.length; i++)
   {
    var e = document.all[i];
    if (e.filters['DXImageTransform.Microsoft.AlphaImageLoader'] || e._png_print)
    {
     if (disable)
     {
      e._png_print = e.style.filter;
      e.style.filter = '';
     }
     else
     {
      e.style.filter = e._png_print;
      e._png_print = '';
     }
    }
   }
  };
  window.attachEvent('onbeforeprint',  function() { printPNGFix(1) });
  window.attachEvent('onafterprint',  function() { printPNGFix(0) });
 }