var kdauer = 60;
var kname = "schriftgroesse";
var kdesign = "Standard";

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 != kdesign) 
  {
    switchStyle(c);
    kdesign = c;
  }
}

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

window.onload = loadStyle;


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

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

function setStyleCookie() {
  setCookie(kname, kdesign, kdauer);
}

function delStyleCookie() {
  delCookie(kname);
}