<public:component>
<public:attach event="onpropertychange" onevent="propertyChanged()" />
<script>

var supported = /MSIE (5\.5)|[6789]/.test(navigator.userAgent) && navigator.platform == "Win32";
var realSrc = "";
var blankSrc = "/ImagesUA/blank.gif";

if (supported) fixImage();

function propertyChanged() {
   if (!supported) return;

   if (event.propertyName != "src") return;

   // if not set to blank
   if(!new RegExp(blankSrc).test(src))
      fixImage();
};

function fixImage() {
   // get src
   var src = element.src;

	 /*if(src == null || src == "")
		src = element.srcbkp;*/

   // check for real change
   if (src == realSrc) {
      element.src = blankSrc;
      return;
   }

	 // backup = 
   if ( ! new RegExp(blankSrc).test(src)) {
      realSrc = src;
   }

   // test for png
   if ( /\.png$/.test( realSrc.toLowerCase() ) ) {
      element.src = blankSrc;
      element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true,sizingMethod='image',src='" + src + "')";
   }
   else {
      element.runtimeStyle.filter = "";
      //element.src = element.srcbkp;
   }
}

</script>
</public:component>