function createCookie(name,value) {
  var heute = new Date();
  heute.setTime(heute.getTime()+(120*86400000));
  var expires = "; expires="+heute.toGMTString();
/*  document.cookie = name+"="+value+";"+expires+"; path=/"; */ 
  document.cookie = name+"="+value+expires+"; path=/"; 
}

function getStyleSheet() {
  var i, sheet;
  for(i=0; (sheet = document.getElementsByTagName("link")[i]); i++) {
    if(sheet.getAttribute("rel").indexOf("style") != -1 && sheet.getAttribute("title") && !sheet.disabled) 
	   return sheet.getAttribute("title");
  }
  return null;
}


function setStyleSheet(title) {
  var i, sheet, main;
  for(i=0; (sheet = document.getElementsByTagName("link")[i]); i++) {
    if(sheet.getAttribute("rel").indexOf("style") != -1 && sheet.getAttribute("title")) {
		   sheet.disabled = true;
		   if(sheet.getAttribute("title") == title) sheet.disabled = false;
    }
  }
}

function getLastStyleSheet() {
  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 getCookieVal (offset) {
   var endstr = document.cookie.indexOf (";", offset);
   if (endstr == -1) endstr = document.cookie.length;
/*   return unescape(document.cookie.substring(offset, endstr)); */
   return unescape(document.cookie.substring(offset, offset+2));
}

function getCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
		while (i < clen) {
			var j = i + alen;
			if (document.cookie.substring(i, j) == arg)
				return getCookieVal (j);
			i = document.cookie.indexOf(" ", i) + 1;
			if (i == 0)	break;
		}
	return null;
}


/*window.onload = function(e) {
	var cookie = getCookie("groesse");
	var title = cookie ? cookie : getLastStyleSheet();
	setStyleSheet(title);
}
*/
window.onunload = function(e) {
	var title = getStyleSheet();
	createCookie("groesse", title, 365);
}

function show_menu() {
	document.getElementById('eintrag1').className = 'sichtbar';
	document.getElementById('eintrag2').className = 'sichtbar';
	document.getElementById('eintrag3').className = 'sichtbar';
	document.getElementById('eintrag4').className = 'sichtbar';
	}