php+jquery跨域提交有关问题，别嫌弃啊只有20分了

<br />$test = "{name:\"John\", message:\"hello John\"}";<br />echo $test;<br />

<br />function sendEmail() {<br />	var orderingId = $("#orderingId").val();<br />	 alert(orderingId);<br />	 $.ajax({<br />		 type: "get",<br />		 url:"http://www.testB.com/cronemail/cron_expressmail.php?orderingid=2222",<br />		 cache : false, <br />		 dataType : "jsonp",<br />		 jsonp: "callbackfun",<br />		 jsonpCallback:"jsonpCallback",<br />                 success:function (json) {<br />			alert(json.message);<br />		}<br />	 })<br />}<br />