https://takayama-garden.com/js/styleswitcher.js

1function setActiveStyleSheet(title) {
2  var i, a, main;
3  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
4    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
5      a.disabled = true;
6      if(a.getAttribute("title") == title) a.disabled = false;
7    }
8  }
9bnsButtonchanger(title);
10}
11
12function bnsButtonchanger(title){
13try{
14	if(title!=null){
15		document.getElementById('img_big').src="http://www.aic-co.jp/common/img/font_big.gif";
16		document.getElementById('img_normal').src="http://www.aic-co.jp/common/img/font_normal.gif";
17		document.getElementById('img_small').src="http://www.aic-co.jp/common/img/font_small.gif";
18		document.getElementById('img_' + title).src="http://www.aic-co.jp/common/img/font_" + title + "_on.gif";
19	};
20}catch(e){
21};
22}
23
24
25
26function getActiveStyleSheet() {
27  var i, a;
28  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
29    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
30  }
31  return null;
32}
33
34function getPreferredStyleSheet() {
35  var i, a;
36  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
37    if(a.getAttribute("rel").indexOf("style") != -1
38       && a.getAttribute("rel").indexOf("alt") == -1
39       && a.getAttribute("title")
40       ) return a.getAttribute("title");
41  }
42  return null;
43}
44
45function createCookie(name,value,days) {
46  if (days) {
47    var date = new Date();
48    date.setTime(date.getTime()+(days*24*60*60*1000));
49    var expires = "; expires="+date.toGMTString();
50  }
51  else expires = "";
52  document.cookie = name+"="+value+expires+"; path=/";
53}
54
55function readCookie(name) {
56  var nameEQ = name + "=";
57  var ca = document.cookie.split(';');
58  for(var i=0;i < ca.length;i++) {
59    var c = ca[i];
60    while (c.charAt(0)==' ') c = c.substring(1,c.length);
61    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
62  }
63return null;
64}
65
66window.onload = function(e) {
67var cookie = readCookie("style");
68if(cookie==null){cookie='normal'};
69var title = cookie ? cookie : getPreferredStyleSheet();
70  setActiveStyleSheet(title);
71
72bnsButtonchanger(cookie);
73
74}
75
76window.onunload = function(e) {
77  var title = getActiveStyleSheet();
78  createCookie("style", title, 365);
79}
80
81var cookie = readCookie("style");
82var title = cookie ? cookie : getPreferredStyleSheet();
83setActiveStyleSheet(title);