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php+jquery跨域提交有关问题，别嫌弃啊只有20分了

WBOYOriginal: 2016-06-13 12:35:07904browse

php+jquery跨域提交问题，别嫌弃啊只有20分了
1：A域服务器端输出json如下

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

2：B域服务端程序如下

<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 />

可是页面提示错误：
用户代理: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Trident/4.0; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
时间戳: Tue, 22 Oct 2013 10:48:39 UTC

消息: Script error
行: 0
字符: 0
代码: 0
URI: http://www.test.com/cronemail/cron_expressmail.php?orderingid=2222&callbackfun=jsonpCallback&_=1382438914750

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