;(function () {

    'use strict'

    var $ = jQuery

    /* HF-CHECK */

    $(document).ready(function () {
        // unterbindet mehrmaliges klicken auf submit button
        $('form').each(function () {
            var clicked = false;
            var form = this;

            $(this).parents('body').submit(function (event) {
                if (event.target !== form) {
                    return;
                }

                if (clicked) {
                    event.preventDefault();
                }

                clicked = true;
            });
        });
    })

})();