if(navigator.appName.indexOf('Explorer') != -1){	
	for(i=0; i<document.images.length; i++){	
		if(document.images[i].src.indexOf('.png') != -1){				 
			antimg = document.images[i].src;
			document.images[i].src = '/images/enblanco.gif';
			document.images[i].runtimeStyle.filter = "filter: progid:DXImageTransform.Microsoft.AlphaImageLoader (src='" + antimg + "', sizingMethod='scale')";				
		}
	}
}