jQuery的Ajax请求，导致浏览器内存泄漏，不断狂涨

最近为了jQuery的事搞的自己对jQuery失去了信心

前台：

<head runat="server">

    <title></title>



    <script src="js/jquery-1.4.2.js" type="text/javascript"></script>



    <script language="javascript" type="text/javascript">

        //表格的行数

        var $index = 20;

        //返回的行数

        var $ICount = 0;



        $(document).ready(function() {

            CreateTable();

            BindTable();

        });



        function CreateTable() {

            $TableStr = "<table width='100%'>";

            for (i = 0; i < $index; i++) {

                $TableStr += "<tr id='trs" + i + "'><td></td><td></td><td></td><td></td></tr>";

            }

            $TableStr += "</table>";

            $("#LoadTable").html($TableStr);

            $TableStr = null;

        }



        function BindTable() {

            $.getJSON("json_Page.ashx?rid=" + Math.random(), ss);

        }





        function ss(data) {

            $.each(data, EachData);



            for (i = 0; i < $index; i++) {

                $("#trs" + i).css("display", "block");

            }

            for (i = $ICount; i < $index; i++) {

                $("#trs" + i).css("display", "none");

            }

        }



        function EachData(i, n) {

            if ($.trim($("#trs" + i + " td:eq(0)").html()) != $.trim(n.SBBH)) {

                $("#trs" + i + " td:eq(0)").html($.trim(n.SBBH));

            }

            if ($.trim($("#trs" + i + " td:eq(1)").html()) != $.trim(n.DLMC)) {

                $("#trs" + i + " td:eq(1)").html($.trim(n.DLMC));

            }

            if ($.trim($("#trs" + i + " td:eq(2)").html()) != $.trim(n.HPHM)) {

                $("#trs" + i + " td:eq(2)").html($.trim(n.HPHM));

            }

            if ($.trim($("#trs" + i + " td:eq(3)").html()) != $.trim(n.JGSJ)) {

                $("#trs" + i + " td:eq(3)").html($.trim(n.JGSJ));

            }



            $ICount = i + 1;

        }

        

       

    </script>



</head>

<body>

    <form id="form1" runat="server">

    <input id="Button1" type="button" value="刷新" onclick="BindTable()" />

    <div id="LoadTable">

    </div>

    </form>

</body>

后台：

private void GetData(HttpContext context)

        {

            SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=123456;database=New_ITS");

            conn.Open();

            SqlCommand cmd = new SqlCommand("select top 20 * from carinfo", conn);

            SqlDataReader dr = cmd.ExecuteReader();

            IList<Entity> carinfo = new List<Entity>();

            while (dr.Read())

            {

                Entity entity = new Entity();

                entity.SBBH = dr["SBBH"].ToString();

                entity.DLMC = dr["DLMC"].ToString();

                entity.HPHM = dr["HPYS"].ToString();

                entity.JGSJ = dr["JGSJ"].ToString();

                carinfo.Add(entity);

            }

            dr.Close(); 

            dr.Dispose(); 

            conn.Close();

            System.Web.Script.Serialization.JavaScriptSerializer js = new System.Web.Script.Serialization.JavaScriptSerializer();

            context.Response.Write(js.Serialize(carinfo));

            context.Response.End();

            

        }

死活都找不出上面的代码会在哪些存在内存泄漏， 可是每点击一次，进程IE的内存就是涨个50K-100K

还请各位想想办法，帮助一下。。。谢谢