测试jsonp

login<?php    $type = $_GET[‘type‘];    if(empty($type)) {        $url = "";

}else {        if($type == ‘logout‘) {            $url = "";        } else{            $url = ";        }    }?><script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script><script type="text/javascript">    $(function(){        $.ajax({            type: "get",            url: "<?php echo $url;?>",            xhrFields: {                withCredentials: true            },            crossDomain: true,            dataType: "jsonp",            jsonp:"jsoncallback",            success: function (res) {                alert(res.msg)            }        });    })</script>