Hi! all!

I wanna listen to the expert's advice. Can anyone solve this problem?

I couldn't use Callback Function's value in another functions.

Is this a Cross Domain problem?

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Client Side
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<script type="text/javascript" src="jquery-1.4.min.js"></script>
<script type="text/javascript">
var a;
$.ajax({
    url : "http://abc.com/a.php?callback=?",
    type: 'GET',
    dataType : 'jsonp',
    success : function(data) {
        window.a=data;
        document.a=data;
        alert(a.string); //Enable
 test(a);
        }
});

alert(a.string); //Disable

test = function(testString) {
 alert(testString); // Enable
 a=testString;
}

alert(a); // Disable

</script>
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Server Side
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Location : http://abc.com/a.php
<?
$json="{ \"string\" : \"this is String\"}";
echo $_GET['callback']."(".$json.")";
?>