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();

if (title != "Blue Style"
	&& title != "Nature"
	&& title != "Féminité") {
	title = "Blue Style";
	createCookie("style", title, 365);
}
setActiveStyleSheet(title);