<public:attach event="ondocumentready" onevent="ondocumentready()" />
<script type="text/javascript">
function ondocumentready() {
  var backgroundImage = this.currentStyle.backgroundImage;
  if (null !== (m = backgroundImage.match(/^\s*url\s*\(\s*["']?\s*([^\)"']+)\s*["']?\s*\)\s*$/i))) {
    var url = m[1];
    /* this.style.backgroundSize = '100% 100% !important' */
    this.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"  + url  + "', sizingMethod='scale')";
  }
}
</script>