var Stil = "800";
var Keks = "Layout";
var Tage = 30;

document.write("<link rel='stylesheet' href='css/green.css' title='cssgreen' type='text/css'>"+
"<link rel='stylesheet' href='css/green_with_banner.css' title='cssgreenbanner' type='text/css'>"+
"<link rel='stylesheet' href='css/red.css' title='cssred' type='text/css'>");

function setHelp(str)
{
	if(str=="") info=""; else info="<img src='img/warning.gif' border='0'> <b>Info</b>:<br>";
	document.getElementById('help').innerHTML=info+str;
}

function switchStyle(s) 
{
	if (!document.getElementsByTagName) return;
	
	var el = document.getElementsByTagName("link");
	
	for (var i = 0; i < el.length; i++ ) 
	{
		if (el[i].getAttribute("rel").indexOf("style") != -1 && el[i].getAttribute("title")) 
		{
			el[i].disabled = true;
			if (el[i].getAttribute("title") == s) el[i].disabled = false;
		}
	}
}

function loadStyle() 
{
	var c = getStyleCookie();
	if (c && c != Stil) 
	{
		switchStyle(c);
		Stil = c;
	}
}

function setStyle(s) 
{
	if (s != Stil) 
	{
		switchStyle(s);
		Stil = s;
	}
}

setStyleCookie();
window.onload = loadStyle;

function setCookie(name, value, expdays) 
{
	// gültig expdays Tage
	var now = new Date();
	var exp = new Date(now.getTime() + (1000*60*60*24*expdays));
	
	document.cookie = name + "=" + escape(value) + ";" +"expires=" + exp.toGMTString() + ";" +"path=/";
}

function delCookie(name) 
{   
	// expires ist abgelaufen
	var now = new Date();
	var exp = new Date(now.getTime() - 1);
	
	document.cookie = name + "=;" +"expires=" + exp.toGMTString() + ";" + "path=/";
}

function getCookie(name) 
{
	var cname = name + "=";
	var dc = document.cookie;
	
	if (dc.length > 0) 
	{
		var start = dc.indexOf(cname);
		
		if (start != -1) 
		{
			start += cname.length;
			var stop = dc.indexOf(";", start);
			
			if (stop == -1) stop = dc.length;
			
			return unescape(dc.substring(start,stop));
		}
	}
	
	return null;
}

function setStyleCookie() 
{
	setCookie(Keks, Stil, Tage);
}

function getStyleCookie() 
{
	return getCookie(Keks);
}

function delStyleCookie() 
{
	delCookie(Keks);
}

function closeMessageBox()
{
	document.getElementById('message').style.display="none";
}