function pngFixIE() {
    var result;
    if (navigator.appName == 'Microsoft Internet Explorer') {
        var version = parseFloat((new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})")).exec(navigator.userAgent)[1]);
        if (version > 5 && version <= 6) {
            result = true;
        } else { result = false; }
    }
    return result;
}