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);