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

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->type:'POST',url:'../php/a.php?ID='+'abc',success: function(data){    alert(data);}

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PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->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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