/**
     * 检测用户当前浏览器
     * @return boolean 是否ie浏览器
     */
    function chk_ie_browser() {
        $userbrowser = $_SERVER['HTTP_USER_AGENT'];
        if ( preg_match( '/MSIE/i', $userbrowser ) ) {
            $usingie = true;
        } else {
            $usingie = false;
        }
        return $usingie;
    }