$(document).ready(function () {
    if (navigator.appName == 'Microsoft Internet Explorer') {
        $('div.sound, div.sound-featured').each(function () {
            var image = extractUrl($(this).css('background-image'));
            if (image != "") {
                $(this).css('filter', 'progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true,sizingMethod=scale,src=' + image + ');');
                $(this).css('background-image', '');
            }
        });
    }
});

function extractUrl(input) {
    // remove quotes and wrapping url()
    return input.replace(/"/g, "").replace(/url\(|\)$/ig, "");
}