/* alle nicht background-png's */
img.png {
    background-image: expression(
        this.runtimeStyle.backgroundImage = "none",
        this.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + this.src + "', sizingMethod='scale')",
        this.src = "/images/blank.gif"
    );
    
}