//由于浏览器的同源策略原则，所以无法跨域传值,但可以用js原理来实现
方法一：用jquery中的jsonp
请求文件：
<!DOCTYPE>
<html>
<head>
<title>lin3615</title>
<script src="jquery-1.8.3.min.js" type="text/javascript"></script>
<script>
$(document).ready(function(){
$.ajax({
type:‘get‘,
url:‘http://www.example.com/ok.php?loginuser=lin3615&loginpass=123456‘,
dataType:‘jsonp‘,
jsonp:‘jsonpcallback‘,
jsonpCallback:‘yes‘,
success: function(data)
{
alert("user:"+data.user+",pass:"+data.pass);
},
error:function(){
alert("eeee");
}
});
});
</script>
</head>
<body>
<h1>xx</h1>
</body>
<html>
// ok.php 文件
$arr = array(
‘user‘=>$_GET[‘loginuser‘],
‘pass‘=>$_GET[‘loginpass‘]
);
echo $_GET[‘jsonpcallback‘].‘(‘.json_encode($arr).‘)‘;
//方法二：
<!DOCTYPE>
<html>
<head>
<title>lin3615</title>
<script>
var flightHandler = function(data)
{
alert(data.price+","+data.tickets);
}
var url = "http://www.example.com/ok.php?a=code";
var script = document.createElement("script");
script.setAttribute(‘src‘, url);
document.getElementsByTagName(‘head‘)[0].appendChild(script);
</script>
</head>
<body>
<h1>xx</h1>
</body>
<html>
// ok.php 文件
if($_GET[‘a‘] == ‘codex‘)
{
echo ‘flightHandler({
"price":100,
"tickets":22
})‘;
}else
{
echo ‘flightHandler({
"price":1,
"tickets":2
})‘;
}
原文：http://www.cnblogs.com/lin3615/p/4309986.html