jQuery - detect for touch only device

If your website includes features that only available to devices with a touch screen , you not need to use external Modernizr libraries only use function below

   <script type="text/javascript">

        $(document).ready(function () {

            if (is_touch_device()) {

                // do something

            }    

        });



        function is_touch_device() {

            return !!('ontouchstart' in window);

        }

    </script>