Alternative CSS Selection (IE)

Andy K · #1 Jul 18th, 2005, 15:55

Hello.

I am wanting to allow users to change css stylesheets on my webpage, using links.
I have been following information from: http://www.alistapart.com/articles/alternate/ but it doesn't explain how to set up the links.

I have two style sheets set up and I have added the Javascript to the page (see below)

How do I set up the <a href .. link to change the style sheet? and which variables do I update in the Javascript please?

Code: Select all

<link href="GA_styles.css" rel="stylesheet" type="text/css" title="blue standard"/>
<link href="GA_styles2.css" rel="alternate stylesheet" type="text/css" title="different"/>

<script language="JavaScript" type="text/javascript">

HTMLLinkElement.getAttribute("rel").indexOf("style") != -1
HTMLListElement.getAttribute("title")
HTMLLinkElement.getAttribute("rel").indexOf("alt") != -1

function setActiveStyleSheet(title) {
   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;
     }
   }
}


</script>

</head>

herkalees · #2 Jul 21st, 2005, 22:06

Here's what I did on my site, and it works perfectly:

This is in a file called styleswitcher.js:

Code: Select all

function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

This is in my head tag and points to the javascript:

Code: Select all

<script type="text/javascript" src="scripts/styleswitcher.js"></script>

This is how my CSS/link tags look in my head tag:

Code: Select all

<link href="styles/webstyle.css" rel="stylesheet" type="text/css" title="webstyle" />
<link href="styles/printstyle.css" rel="alternate stylesheet" type="text/css" title="printstyle" />

Thos rel tags are necessary

And here are the actual links which allow a visitor to choose:

Code: Select all

Page Style: Web / Print

[/b]

Andy K · #3 Jul 26th, 2005, 13:45

Thanks very much for this

herkalees · #4 Jul 30th, 2005, 04:31

Quote:

Originally Posted by Andy K

Thanks very much for this

You're welcome twice as much.

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Alternative CSS Selection (IE)