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Thread: Style Sheet Switcher (v1.1)

  1. #1
    Join Date
    Jan 2009
    Thanked 0 Times in 0 Posts

    Default Style Sheet Switcher (v1.1)

    Hi guys,

    I have succesfully installed the style switcher and it appears to be working properly in all browsers.

    However the one thing I am having problems with is the drop down select menu remembering the chosen selected style.

    I have followed the directions and I have installed the code inside the styleswitch.js which should work. But I get the following error in Firebug...

    element is undefined
    indicateSelected(undefined)styleswitch.js (line 54)
    onload()()styleswitch.js (line 94)
    [Break on this error] if (selectedtitle!=null && (element.type...element is a radio button or select menu
    Below is my styleswitch.js

    //Style Sheet Switcher version 1.1 Oct 10th, 2006
    //Author: Dynamic Drive:
    //Usage terms:
    var manual_or_random="manual" //"manual" or "random"
    var randomsetting="3 days" //"eachtime", "sessiononly", or "x days (replace x with desired integer)". Only applicable if mode is random.
    //////No need to edit beyond here//////////////
    function getCookie(Name) { 
    var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
    if (document.cookie.match(re)) //if cookie found
    return document.cookie.match(re)[0].split("=")[1] //return its value
    return null
    function setCookie(name, value, days) {
    var expireDate = new Date()
    //set "expstring" to either future or past date, to set or delete cookie, respectively
    var expstring=(typeof days!="undefined")? expireDate.setDate(expireDate.getDate()+parseInt(days)) : expireDate.setDate(expireDate.getDate()-5)
    document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/";
    function deleteCookie(name){
    setCookie(name, "moot")
    function setStylesheet(title, randomize){ //Main stylesheet switcher function. Second parameter if defined causes a random alternate stylesheet (including none) to be enabled
    var i, cacheobj, altsheets=[""]
    for(i=0; (cacheobj=document.getElementsByTagName("link")[i]); i++) {
    if(cacheobj.getAttribute("rel").toLowerCase()=="alternate stylesheet" && cacheobj.getAttribute("title")) { //if this is an alternate stylesheet with title
    cacheobj.disabled = true
    altsheets.push(cacheobj) //store reference to alt stylesheets inside array
    if(cacheobj.getAttribute("title") == title) //enable alternate stylesheet with title that matches parameter
    cacheobj.disabled = false //enable chosen style sheet
    if (typeof randomize!="undefined"){ //if second paramter is defined, randomly enable an alt style sheet (includes non)
    var randomnumber=Math.floor(Math.random()*altsheets.length)
    return (typeof randomize!="undefined" && altsheets[randomnumber]!="")? altsheets[randomnumber].getAttribute("title") : "" //if in "random" mode, return "title" of randomly enabled alt stylesheet
    function chooseStyle(styletitle, days){ //Interface function to switch style sheets plus save "title" attr of selected stylesheet to cookie
    if (document.getElementById){
    setCookie("mysheet", styletitle, days)
    function indicateSelected(element){ //Optional function that shows which style sheet is currently selected within group of radio buttons or select menu
    if (selectedtitle!=null && (element.type==undefined || element.type=="select-one")){ //if element is a radio button or select menu
    var element=(element.type=="select-one") ? element.options : element
    for (var i=0; i<element.length; i++){
    if (element[i].value==selectedtitle){ //if match found between form element value and cookie value
    if (element[i].tagName=="OPTION") //if this is a select menu
    else //else if it's a radio button
    if (manual_or_random=="manual"){ //IF MANUAL MODE
    var selectedtitle=getCookie("mysheet")
    if (document.getElementById && selectedtitle!=null) //load user chosen style sheet from cookie if there is one stored
    else if (manual_or_random=="random"){ //IF AUTO RANDOM MODE
    if (randomsetting=="eachtime")
    setStylesheet("", "random")
    else if (randomsetting=="sessiononly"){ //if "sessiononly" setting
    if (getCookie("mysheet_s")==null) //if "mysheet_s" session cookie is empty
    document.cookie="mysheet_s="+setStylesheet("", "random")+"; path=/" //activate random alt stylesheet while remembering its "title" value
    setStylesheet(getCookie("mysheet_s")) //just activate random alt stylesheet stored in cookie
    else if (^[1-9]+ days/i)!=-1){ //if "x days" setting
    if (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
    setCookie("mysheet_r", setStylesheet("", "random"), parseInt(randomsetting)) //activate random alt stylesheet while remembering its "title" value
    setCookie("mysheet_r_days", randomsetting, parseInt(randomsetting)) //Also remember the number of days to persist per the "x days" variable
    setStylesheet(getCookie("mysheet_r")) //just activate random alt stylesheet stored in cookie
    var formref=document.getElementById("switchform")
    Note the code at the very end...
    var formref=document.getElementById("switchform")

  2. #2
    Join Date
    Aug 2004
    Thanked 1,008 Times in 993 Posts
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    Warning: Please include a link to the DD script in question in your post. See this thread for the proper posting format when asking a question.

    Also, in this case, please post a link to the page on your site that contains the problematic script so we can check it out.
    DD Admin


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