https://iabtechlab.com/wp-content/themes/modality/js/stickUp.js?ver=7.1.2

1jQuery(
2function($) {
3	
4	$(document).ready(function(){
5		var contentButton = [];
6		var contentTop = [];
7		var content = [];
8		var lastScrollTop = 0;
9		var scrollDir = '';
10		var itemClass = '';
11		var itemHover = '';
12		var menuSize = null;
13		var stickyHeight = 0;
14		var stickyMarginB = 0;
15		var currentMarginT = 0;
16		var topMargin = 0;
17		$(window).scroll(function(event){
18   			var st = $(this).scrollTop();
19   			if (st > lastScrollTop){
20       			scrollDir = 'down';
21   			} else {
22      			scrollDir = 'up';
23   			}
24  			lastScrollTop = st;
25		});
26		$.fn.stickUp = function( options ) {
27			// adding a class to users div
28			$(this).addClass('stuckMenu');
29        	//getting options
30        	var objn = 0;
31        	if(options != null) {
32	        	for(var o in options) {
33	        		if (options.hasOwnProperty(o)){
34	        			content[objn] = options[objn];
35	        			objn++;
36	        		}
37	        	}
38	  			if(objn == 0) {
39	  				console.log('error:needs arguments');
40	  			}
41
42	  			itemClass = options.itemClass;
43	  			itemHover = options.itemHover;
44	  			if(options.topMargin != null) {
45	  				if(options.topMargin == 'auto') {
46	  					topMargin = parseInt($('.stuckMenu').css('margin-top'));
47	  				} else {
48	  					if(isNaN(options.topMargin) && options.topMargin.search("px") > 0){
49	  						topMargin = parseInt(options.topMargin.replace("px",""));
50	  					} else if(!isNaN(parseInt(options.topMargin))) {
51	  						topMargin = parseInt(options.topMargin);
52	  					} else {
53	  						console.log("incorrect argument, ignored.");
54	  						topMargin = 0;
55	  					}	
56	  				}
57	  			} else {
58	  				topMargin = 0;
59	  			}
60	  			menuSize = $('.'+itemClass).length;
61  			}			
62			stickyHeight = parseInt($(this).height());
63			stickyMarginB = parseInt($(this).css('margin-bottom'));
64			currentMarginT = parseInt($(this).next().closest('div').css('margin-top'));
65			vartop = parseInt($(this).offset().top);
66			//$(this).find('*').removeClass(itemHover);
67		}
68		$(document).on('scroll', function () {
69			var varscroll = parseInt($(document).scrollTop());
70
71			if (vartop < varscroll + topMargin) {
72				// Add class when scrolling down
73				$('.stuckMenu').addClass('isStuck');
74				$('.stuckMenu').next().closest('div').css({
75					'margin-top': stickyHeight + stickyMarginB + currentMarginT + 'px'
76				});
77				$('.stuckMenu').css("position", "fixed");
78				$('.isStuck').css({ top: '0px' });
79			} else {
80				// Remove class when scrolling back up
81				$('.stuckMenu').removeClass('isStuck');
82				$('.stuckMenu').next().closest('div').css({
83					'margin-top': currentMarginT + 'px'
84				});
85				$('.stuckMenu').css("position", "relative");
86			}
87		});
88
89	});
90
91});