function msieversion() {
    var ua = window.navigator.userAgent;
    var msie = ua.indexOf("MSIE ");

    if (msie > 0) // If Internet Explorer, return version number
        return parseInt(ua.substring(msie + 5, ua.indexOf(".", msie)));
    else // If another browser, return 0
        return 0;
}

function CheckBrowser(url) {

    var version = msieversion();
    if (version > 0 && version <= 8) {
        if (url != "")
            window.location = url;
    }
}