http://rcforum.su/clientscript/vbulletin_css/styleswitch.js

1
2
3var manual_or_random="manual" //"manual" or "random"
4var randomsetting="3 days" //"eachtime", "sessiononly", or "x days (replace x with desired integer)". Only applicable if mode is random.
5
6//////No need to edit beyond here//////////////
7
8function getCookie(Name) { 
9var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
10if (document.cookie.match(re)) //if cookie found
11return document.cookie.match(re)[0].split("=")[1] //return its value
12return null
13}
14
15function setCookie(name, value, days) {
16var expireDate = new Date()
17//set "expstring" to either future or past date, to set or delete cookie, respectively
18var expstring=(typeof days!="undefined")? expireDate.setDate(expireDate.getDate()+parseInt(days)) : expireDate.setDate(expireDate.getDate()-5)
19document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/";
20}
21
22function deleteCookie(name){
23setCookie(name, "moot")
24}
25
26
27function setStylesheet(title, randomize){ //Main stylesheet switcher function. Second parameter if defined causes a random alternate stylesheet (including none) to be enabled
28var i, cacheobj, altsheets=[""]
29for(i=0; (cacheobj=document.getElementsByTagName("link")[i]); i++) {
30if(cacheobj.getAttribute("rel").toLowerCase()=="alternate stylesheet" && cacheobj.getAttribute("title")) { //if this is an alternate stylesheet with title
31cacheobj.disabled = true
32altsheets.push(cacheobj) //store reference to alt stylesheets inside array
33if(cacheobj.getAttribute("title") == title) //enable alternate stylesheet with title that matches parameter
34cacheobj.disabled = false //enable chosen style sheet
35}
36}
37if (typeof randomize!="undefined"){ //if second paramter is defined, randomly enable an alt style sheet (includes non)
38var randomnumber=Math.floor(Math.random()*altsheets.length)
39altsheets[randomnumber].disabled=false
40}
41return (typeof randomize!="undefined" && altsheets[randomnumber]!="")? altsheets[randomnumber].getAttribute("title") : "" //if in "random" mode, return "title" of randomly enabled alt stylesheet
42}
43
44function chooseStyle(styletitle, days){ //Interface function to switch style sheets plus save "title" attr of selected stylesheet to cookie
45if (document.getElementById){
46setStylesheet(styletitle)
47setCookie("mysheet", styletitle, days)
48}
49}
50
51function indicateSelected(element){ //Optional function that shows which style sheet is currently selected within group of radio buttons or select menu
52if (selectedtitle!=null && (element.type==undefined || element.type=="select-one")){ //if element is a radio button or select menu
53var element=(element.type=="select-one") ? element.options : element
54for (var i=0; i<element.length; i++){
55if (element[i].value==selectedtitle){ //if match found between form element value and cookie value
56if (element[i].tagName=="OPTION") //if this is a select menu
57element[i].selected=true
58else //else if it's a radio button
59element[i].checked=true
60break
61}
62}
63}
64}
65
66if (manual_or_random=="manual"){ //IF MANUAL MODE
67var selectedtitle=getCookie("mysheet")
68if (document.getElementById && selectedtitle!=null) //load user chosen style sheet from cookie if there is one stored
69setStylesheet(selectedtitle)
70}
71else if (manual_or_random=="random"){ //IF AUTO RANDOM MODE
72if (randomsetting=="eachtime")
73setStylesheet("", "random")
74else if (randomsetting=="sessiononly"){ //if "sessiononly" setting
75if (getCookie("mysheet_s")==null) //if "mysheet_s" session cookie is empty
76document.cookie="mysheet_s="+setStylesheet("", "random")+"; path=/" //activate random alt stylesheet while remembering its "title" value
77else
78setStylesheet(getCookie("mysheet_s")) //just activate random alt stylesheet stored in cookie
79}
80else if (randomsetting.search(/^[1-9]+ days/i)!=-1){ //if "x days" setting
81if (getCookie("mysheet_r")==null || parseInt(getCookie("mysheet_r_days"))!=parseInt(randomsetting)){ //if "mysheet_r" cookie is empty or admin has changed number of days to persist in "x days" variable
82setCookie("mysheet_r", setStylesheet("", "random"), parseInt(randomsetting)) //activate random alt stylesheet while remembering its "title" value
83setCookie("mysheet_r_days", randomsetting, parseInt(randomsetting)) //Also remember the number of days to persist per the "x days" variable
84}
85else
86setStylesheet(getCookie("mysheet_r")) //just activate random alt stylesheet stored in cookie
87} 
88}