Jquery function clicking on element instead of clicking on element running while loading page

<script>
        $(document).ready(function () {
            MyFunction();
            $("#EnterLongUrl").click(function () {
                MyFunction();
            });
        });

        function MyFunction()
        {
            $.ajax({
                type: "POST",
                url: "/home/GetShortURL",
                contentType: "application/json;charset=utf-8",
                dataType: "json",
                data: '{ "longUrl" : "' + $("#LongUrlText").val() + '" }',
                success: function (results) {
                    $("#ShortUrl").val(results);
                },
                error: function (err) {
                    alert(err.status + " - " + err.statusText);
                }
            });
        }


    </script>

$("#EnterLongUrl").trigger('click');