求助！fileUpload图片预览IE6无效，求各位高手帮忙解决一下！

<h1 id="d" style="border: 1px solid black; filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=image);">
        预览区
    </h1>
    <script>
        function f(theimg)
        {
            d.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = theimg.value;
            d.style.width = d.offsetWidth / 4;
            d.style.height = d.offsetHeight / 4;
            d.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").sizingMethod = 'scale';
        }  
    </script>
    <input type="file" onpropertychange="f(this)">