.png { 
        filter: expression(
                (runtimeStyle.filter == '') ? runtimeStyle.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src='+currentStyle.backgroundImage.split('\"')[1]+', sizingMethod=crop)' : runtimeStyle.filter,
                runtimeStyle.backgroundImage = 'none');
}

.png a { position: relative; }

img.png {
        filter: expression(
                (runtimeStyle.filter == '') ? runtimeStyle.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src='+src+', sizingMethod=scale)' : '',
                width = width,
                src = '/images/null.gif');
}