Parsing JSON array with jquery ajax
===

I would like to parse JSON array data with jquery ajax with the following code:

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <title>Sample</title>
    <script type="text/javascript" src="Scripts/jquery-1.7.2.min.js"></script>
    <script type="text/javascript">
        var result;
        function jsonparser1() {
            $.ajax({
                type: "GET",
                url: "http://10.211.2.219:8080/SampleWebService/sample.do",
                dataType: "jsonp",
                success: function (xml) {
                    alert(xml.data[0].city);
                    result = xml.code;
                    document.myform.result1.value = result;
                },
            });
        }        
    </script>    
    </head>
    <body>
    <p id="details"></p>
    <form name="myform">
        <input type="button" name="clickme" value="Click here to show the first name" onclick=jsonparser1() />
        <input type="text" name="result1" readonly="true"/>        
    </form>
    </body>
    </html>

My JSON data is:

    {"Data":   [{"Address":"chetpet","FirstName":"arulmani","Id":1,"LastName":"sathish","City":"chennai"},{"Address":"ramapuram","FirstName":"raj","Id":2,"LastName":"nagu","City":"chennai"},{"Address":"ramapuram","FirstName":"raj","Id":2,"LastName":"nagu","City":"chennai"},{"Address":"ramapuram","FirstName":"ramaraj","Id":3,"LastName":"rajesh","City":"chennai"},{"Address":"ramapuram","FirstName":"yendran","Id":3,"LastName":"sathi","City":"chennai"}],"Code":true}

But i am not getting any output...anybody please help out...