https://www.grad-vodice.hr/assets/templates/grad/js/styleswitcher.js

1function setSheet(id, sheet) {
2  if (sheet === '') {
3    document.getElementById(id).removeAttribute('href');
4  } else {
5    document.getElementById(id).setAttribute('href', sheet);
6  }
7}
8
9function createCookie(name, value, days) {
10  if (days) {
11    var date = new Date();
12    date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
13    var expires = '; expires=' + date.toGMTString();
14  } else {
15    expires = '';
16  }
17  document.cookie = name + '=' + value + expires + '; path=/';
18}
19
20function readCookie(name) {
21  var nameEQ = name + '=';
22  var ca = document.cookie.split(';');
23  for (var i = 0; i < ca.length; i++) {
24    var c = ca[i];
25    while (c.charAt(0) == ' ') {
26      c = c.substring(1, c.length);
27    }
28    if (c.indexOf(nameEQ) == 0) {
29      return c.substring(nameEQ.length, c.length);
30    }
31  }
32  
33  return null;
34}
35
36var colorSheets = ['', 'assets/templates/grad/css/cb.css'];
37
38var textSheets = ['', 'assets/templates/grad/css/text.css'];
39
40var linkSheets = ['', 'assets/templates/grad/css/link.css'];
41
42function setColor(index) {
43  setSheet('color', colorSheets[index]);
44}
45 
46function setText(index) {
47  setSheet('text', textSheets[index]);
48}
49
50function setLink(index) {
51  setSheet('link', linkSheets[index]);
52}
53
54function toggleColor() {
55  var style = JSON.parse(readCookie('style'));
56  style['color'] = (style['color'] + 1) % colorSheets.length;
57  createCookie('style', JSON.stringify(style));
58  setColor(style['color']);  
59}
60
61function toggleText() {
62  var style = JSON.parse(readCookie('style'));
63  style['text'] = (style['text'] + 1) % textSheets.length;
64  createCookie('style', JSON.stringify(style));
65  setText(style['text']);
66}
67
68function toggleLink() {
69  var style = JSON.parse(readCookie('style'));
70  style['link'] = (style['link'] + 1) % linkSheets.length;
71  createCookie('style', JSON.stringify(style));
72  setLink(style['link']);
73}
74
75function initializeStyle() {
76  var cookie = readCookie('style');
77  if (cookie == null) {
78    cookie = JSON.stringify({'color': 0, 'text': 0, 'link': 0});
79    createCookie('style', cookie, 1);
80  }
81  var style = JSON.parse(cookie);
82  setColor(style['color']);
83  setText(style['text']);
84  setLink(style['link']);
85
86}
87
88initializeStyle();
89
90// window.onload = function(e) {
91//  initializeStyle();
92// };