https://dna-am.co.jp/wp-content/themes/dna_am_new/js/followwidget.js?ver=6.8.10

1// JavaScript Document
2
3//追尾ウィジェット
4(function($) {
5	$(document).ready(function() {
6		/*
7		Ads Sidewinder
8		by Hamachiya2. https://d.hatena.ne.jp/Hamachiya2/20120820/adsense_sidewinder
9		*/
10		var main = $('main'); // メインカラムのID
11		var side = $('#sidebar'); // サイドバーのID
12		var wrapper = $('#widget-tracking'); // 広告を包む要素のID
13		
14		var x = 767;
15		var inner_w = window.innerWidth;
16		
17		if(x < inner_w){
18			if( main.length && side.length && wrapper.length ){ // ページテンプレートで１カラム表示タイプを選んだときのエラー回避
19				var sideMargin = {
20					top: side.css('margin-top') ? side.css('margin-top') : 0,
21					right: side.css('margin-right') ? side.css('margin-right') : 0,
22					bottom: side.css('margin-bottom') ? side.css('margin-bottom') : 0,
23					left: side.css('margin-left') ? side.css('margin-left') : 0
24				};
25
26				var w = $(window);
27				var wrapperHeight = wrapper.outerHeight();
28				var wrapperTop = wrapper.offset().top;
29				var sideLeft = side.offset().left;
30
31				var winLeft;
32				var pos;
33
34				var scrollAdjust = function() {
35					var sideHeight = side.outerHeight();
36					var mainHeight = main.outerHeight();
37					var mainAbs = main.offset().top + mainHeight;
38					var winTop = w.scrollTop();
39					var winLeft = w.scrollLeft();
40					var winHeight = w.height();
41					var nf = (winTop > wrapperTop) && (mainHeight > sideHeight) ? true : false;
42					var pos = !nf ? 'static' : (winTop + wrapperHeight) > mainAbs ? 'absolute' : 'fixed';
43					if (pos === 'fixed') {
44						side.css({
45							position: pos,
46							top: '',
47							bottom: winHeight - wrapperHeight - 40,
48							left: sideLeft - winLeft,
49							margin: 0
50						});
51
52					} else if (pos === 'absolute') {
53						side.css({
54							position: pos,
55							top: mainAbs - sideHeight,
56							bottom: '',
57							left: sideLeft,
58							margin: 0
59						});
60
61					} else {
62						side.css({
63							position: pos,
64							marginTop: sideMargin.top,
65							marginRight: sideMargin.right,
66							marginBottom: sideMargin.bottom,
67							marginLeft: sideMargin.left
68						});
69					}
70				};
71
72				var resizeAdjust = function() {
73					side.css({
74						position:'static',
75						marginTop: sideMargin.top,
76						marginRight: sideMargin.right,
77						marginBottom: sideMargin.bottom,
78						marginLeft: sideMargin.left
79					});
80					sideLeft = side.offset().left;
81					winLeft = w.scrollLeft();
82					if (pos === 'fixed') {
83						side.css({
84							position: pos,
85							left: sideLeft - winLeft,
86							margin: 0
87						});
88
89					} else if (pos === 'absolute') {
90						side.css({
91							position: pos,
92							left: sideLeft,
93							margin: 0
94						});
95					}
96				};
97				w.on('load', scrollAdjust);
98				w.on('scroll', scrollAdjust);
99				w.on('resize', resizeAdjust);
100			}
101		}
102	});
103})(jQuery);