function logoutUser() {
    ret = SiteServices.LogoutUser(logoutUserComplete, logoutUserFailed);
}

function logoutUserComplete(arg) {
    window.location.href('/Home.aspx');
}

function logoutUserFailed(arg) {
    alert('Could not logout user.');
}

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
}