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$.fn.isVisible = function() {
    // Am I visible?
    // Height and Width are not explicitly necessary in visibility detection, the bottom, right, top and left are the
    // essential checks. If an image is 0x0, it is technically not visible, so it should not be marked as such.
    // That is why either width or height have to be > 0.
    var rect = this[0].getBoundingClientRect();
    return (
        (rect.height > 0 || rect.width > 0) &&
        rect.bottom > 0 &&
        rect.right > 0 &&

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//26-5-2020 update: possibly shorter, and better, since 'click' now fires on a tap, and is not prevented by the previous script. 
//Also: more concatenation.
$(document).on('touchstart, click', 'a.taphover', function (e) {
    if (!$(this).hasClass('hover')) { e.preventDefault(); }
    $('.taphover').not($(this).toggleClass('hover')).removeClass('hover');
});

//the previous version:

//taphover - a solution to the lack of hover on touch devices.

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/*!
 * jQuery Collision Detection - v1.0 - 1/7/2014
 * http://www.hnldesign.nl/work/code/collision-prevention-using-jquery/
 *
 * Copyright (c) 2014 HN Leussink
 * Dual licensed under the MIT and GPL licenses.
 *
 * Example: http://code.hnldesign.nl/demo/hnl.collision.detection.html
 */

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/**
 * jQuery inertial Scroller v1.5
 * (c)2013 hnldesign.nl
 * This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/.
 *
 * More information: http://www.hnldesign.nl/work/code/momentum-scrolling-using-jquery/
 */
/*jslint browser: true*/
/*global $, jQuery*/

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//count elements, return jQuery object if more than specified, else return empty object to 'stop' chaining
// usage: $('myElement').atLeast(2).fadeOut(); fadeOut will only execute on elements when 2 or more have been found
(function ($) {
    "use strict";
    $.fn.atLeast = function (count) {
        if (this.length >= count) {
            //return the objects
            return this;
        } else {
            //return empty jquery object to 'break' the chain

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function valBetween($val, $min, $max) {
  return (Math.min($max, Math.max($min, $val)));
}