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

// --------------
// Style Switcher
// --------------

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;



// -----------------
// Cookie-Funktionen
// -----------------

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);
}