function styleChanger() {
	this.tabStyles = document.getElementsByTagName("link");
	
	this.change = function (number) {
		this.createCookie("style_choice", number, 90);
		
		var title = '';
		
		switch (number) {
			case '1' :
				heure = new Date();
				heure = heure.getHours();
				
				if(heure >= 6 && heure < 9)
				title = 'Aube';
				else if(heure >= 9 && heure < 18)
				title = 'Jour';
				else if(heure >= 18 && heure < 20)
				title = 'Crepuscule';
				else
				title = 'Nuit';
			break;
			case '2' :
				title = 'Aube';
			break;
			case '3' :
				title = 'Jour';
			break;
			case '4' :
				title = 'Crepuscule';
			break;
			case '5' :
				title = 'Nuit';
			break;
		}
			
			
		for(var i=0; (linkStyle = this.tabStyles[i]); i++)
		{
			if(linkStyle.getAttribute("rel").indexOf("style") != -1 && linkStyle.getAttribute("title"))
			{
				linkStyle.disabled = true;
				if(linkStyle.getAttribute("title") == title)
				linkStyle.disabled = false;
			}
		}
	}
	
	this.createCookie = function (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=/";
	}
	
	this.readCookie = function (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;
	}
	
	this.getStyleActive = function () {
		var cookie = this.readCookie("style_choice");
		
		if(cookie)
		this.change(cookie);
		
		return cookie;
	}
	
	
	this.getStyleActive();
}





var changeStyle = new styleChanger();