Validate FileUpload Accept Only xlsx File

    

    $(function () {

            $('input:file').change(function () {

                var ext = this.value.split('.').pop();

                var FileExt = ['xlsx']

                if ($.inArray($(this).val().split('.').pop().toLowerCase(), FileExt) == -1) {

                    var xl = "Please Select xlsx Format Files"

                    alert(xl);

                    this.$find('input:file').dispose();

                    return false;

                }

            });

        });