AJAX传递参数，PHP无法获取解决思路

AJAX传递参数，PHP无法获取
AJAX代码如下：

JScript code

<!--

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-->
type:'POST',
url:'../php/a.php?ID='+'abc',
success: function(data)
{
    alert(data);
}

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PHP code

<!--

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-->
echo $_GET['ID'];

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HTML code

    
        <meta charset="gb2312">
        <title></title>    
        <script src="http://code.jquery.com/jquery-latest.js"></script>
        <style>
        
        </style>
    
    
        
        <script>
            $.ajax({
                type:'POST',
                url:'index.php?ID='+'abc',
                success: function(data)
                {
                    alert(data);
                }
            })
        </script>
    

<br><font color="#e78608">------瑙ｅ</font>

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