html 代码：

<script type="text/javascript" src="http://你的域名/js/jquery-1.4.2.min.js"></script>

 <script type="text/javascript"> 

$(function(){  

$.ajax(  

    {  

        type:'get',  

        url : 'http://你的域名/test.php?loginuser=lee&loginpass=123456',  

        dataType : 'jsonp',  

        jsonp:"jsoncallback",  

        success  : function(data) {  

            alert("用户名："+ data.user +" 密码："+ data.pass);  

        },  

        error : function() {  

            alert('fail');  

        }  

    }  

);  

}) 

</script> 





服务端 test.php

<?php  

header('Content-Type:text/html;Charset=utf-8');  

$arr = array(  

    "user" => $_GET['loginuser'],  

    "pass" => $_GET['loginpass'],  

    "name" => 'response'  

  

);  

echo $_GET['jsoncallback'] . "(".json_encode($arr).")";