How to ajax call in success method?

<script>
    function BindData() {
        $.ajax({
            type: "POST",
            url: "pageName.aspx/webMethodName",
            data: "{}",
            contentType: "application/json",
            dataType: "json",
            success: function (data) {
               //Success function
               calculate();
            }

        })

    }

   function calculate(){
      //do your stuff here
   }

</script>