flv = {};

flv.display = {
  "alphaBackgrounds" : function (e) {
    var bg = e.currentStyle.backgroundImage;
    if (bg.match(/\.png/i) != null) { 
      var mypng = bg.substring(5,bg.length-2);
      e.setStyle({
        filter : "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + mypng + "', sizingMethod='" + (e.currentStyle.backgroundRepeat == "no-repeat" ? "crop" : "scale") + "')",
        backgroundImage : "none"}); 
    }
  }
};

document.observe("dom:loaded", function() {
  if (Prototype.Browser.IE) {
    var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, "");
    if (rslt != null && Number(rslt[1]) >= 5.5 && Number(rslt[1]) < 7) {
      $$(".ombre_png_left, .ombre_png_right").each(flv.display.alphaBackgrounds);
    }
  }
});