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();
setActiveStyleSheet(title);
/* switch - menu */
	var menuStandard=""; var menuBigger=""; var menuText=""; var schrift="";
if (navigator.cookieEnabled == true) {
	schrift="Schrift ";
	if (title == "Standard" || title == ""){
		menuStandard = "";
	} else{
		menuStandard ="<a href=\"#\" onclick=\"setActiveStyleSheet('Standard');location.reload(); return false;\">[-]&nbsp;</a>";
	}
	if ( title == "Bigger"){
		menuBigger = "";
	} else {
		menuBigger = "<a href=\"#\" onclick=\"setActiveStyleSheet('Bigger'); location.reload();return false;\">[+]&nbsp;</a>";
	}
	if( title == "Text"){
		schrift= "Zur&uuml;ck zur&nbsp;"
		menuText = "";
		menuBigger = "";
		menuStandard ="<a href=\"#\" onclick=\"setActiveStyleSheet('Standard');location.reload(); return false;\">[Grafikversion]</a>";
	} else{
		menuText = "<a href=\"#\" onclick=\"setActiveStyleSheet('Text'); location.reload();return false;\">[Textversion]</a>";
	}
}