var CookieName							= 'StyleSheet';

function setActiveStyleSheet(title) {
	var i, a;
	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 listActiveStyleSheets(targetID) {
	TextStandard						= '';
	Text								= '';

	var i, a, Link;
	for (i=0; (a=document.getElementsByTagName('link')[i]); i++) {
		if (	a.getAttribute('rel').indexOf('style') != -1
				&& a.getAttribute('title')
				) {

			Link						= "<a href='#' onclick=\"setActiveStyleSheet('" + a.getAttribute('title') + "'); return false;\">" + a.getAttribute('title') + "</a>";
			if ( a.getAttribute('rel').indexOf('alternate') == -1 )
					// Standard-Stylesheet zuerst
					Text				= Link + Text;
			else	Text				+= Link;
			}
		}

	var target							= document.getElementById(targetID);
	target.innerHTML					= 'Style: '+Text;
	}

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(CookieName);
	var title							= cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
	}
window.onunload = function(e) {
	var title							= getActiveStyleSheet();
	createCookie(CookieName, title, 365);
	}