/**

     * 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;

    }