通过提供IP地址作为输入，使用bing map API查找邮政编码

In my page I need a sample example to find the zipcode using bingmapApi by giving ipaddress as input ,i have tried by giving address as input and displayed latitude and longitude

The code I used for displaying latitude and longitude given below

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#btnSearch").click(function () {
                //check user has entered something first
                if ($("#txtAddress").val().length > 0) {
                    //send location query to bing maps REST api
                    $.getJSON('http://dev.virtualearth.net/REST/v1/Locations?query=' + $("#txtAddress").val() + '&key=mykey&jsonp=?', function (result) {
                        if (result.resourceSets[0].estimatedTotal > 0) {
                            var loc = result.resourceSets[0].resources[0].point.coordinates;
                            $("#results").html('latitude:' + loc[0] + ', longitude:' + loc[1]);
                        }
                        else {
                            $("#results").html("sorry that address cannot be found");
                        }
                    });
                }
                else {
                    $("#results").html("please enter an address");
                }
            });
        });
    </script>
    <label for="myaddress">Type an address:</label>
    <input type="text" id="txtAddress" />
    <input type="button" id="btnSearch" value="Find Location" />
    <p id="results"></p>

Really What I want to do is, displaying the zipcode using the bingmapAPI by giving IP address as input. Thanks in advance.