try{
  document.execCommand("BackgroundImageCache", false, true);
} catch(e) {}

function fixPNG(element)
{
  if (/MSIE (5\.5|6).+Win/.test(navigator.userAgent))
  {
    var src;

    if (element.tagName == 'IMG')
    {
      if (/\.png$/.test(element.src))
      {
        src = element.src;
        element.src = "./images/transp.gif";
      }
    }
    else
    {
      src = element.currentStyle.backgroundImage
      .match(/url\("(.+\.png)"\)/i)
      if (src)
      {
        src = src[1];
        element.runtimeStyle.backgroundImage = "none";
      }
    }

    var re_scale_mode = /iesizing\-(\w+)/;
    var m = re_scale_mode.exec(element.className);

    var scale_mode = (m) ? m[1] : 'crop';

    if (src)
    element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"
    + src + "',sizingMethod='" + scale_mode + "')";
  }
}