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Return value from function with an Ajax call [duplicate] (Jquery : call ajax and return value in function)

Jquery Code

<script src="jscripts/jquery-1.7.2.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        test();

        function test() {
            alert('Call Ajax Function');
            myFunction(function (d) {
                //processing the data
                alert("Return Datetime from Ajax Request. The Datetime is : " + d);
            });
            alert('Done');
        }

        function myFunction(callback) {
            $.ajax({
                type: "POST",
                url: "AjaxFunctionReturnValue.aspx/Test",
                data: "{}",
                contentType: "application/json; charset=utf-8",
                timeout: 5000,
                dataType: "json",
                success: function (data) {
                    callback(data.d);
                },
                error: function (request, strError) {
                    alert(strError);
                }
            });
        }
    </script>
C# Code

 [WebMethod]
    public static string Test()
    {
       return DateTime.Now.ToString();
    }
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