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

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

