var defaultStil = "default";
var Stil = defaultStil;
var Keks = "Layout";
var Tage = 30;

// Style Switcher

function setSize(size) {

    var body = document.getElementsByTagName("body")[0];
    var s = body.style.fontSize;

    if (size == "up") {
        if (s == "80%") body.style.fontSize = "87%";
        if (s == "87%") body.style.fontSize = "100%";
        if (s == "" || s == "100%") body.style.fontSize = "115%";
        if (s == "115%") body.style.fontSize = "130%";
    } else {
        if (s == "130%") body.style.fontSize = "115%";
        if (s == "115%") body.style.fontSize = "100%";
        if (s == "" || s == "100%") body.style.fontSize = "87%";
        if (s == "87%") body.style.fontSize = "80%";
    }

	 //alert('setze groesse ['+body.style.fontSize + ']');	 
	 setCookie('fontsize', body.style.fontSize, Tage);
}

//init with cookie
function getSize() {
  var body = document.getElementsByTagName("body")[0];
  var s =  getCookie('fontsize');
  	 //alert('lade Groesse ['+s + ']');

  if (s && s != '100%') {
	  	body.style.fontSize = s;
  }
}


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 =  getCookie(Keks);
  if (c && c != Stil) {
    switchStyle(c);
    Stil = c;
  }
  getSize();
}

function setStyle(s) {
  if (s != Stil) {
    switchStyle(s);
    Stil = s;
  } else {
    switchStyle(defaultStil);
    Stil = defaultStil;
  }
  //alert('speicher layout ['+Stil + ']');
  setCookie(Keks, Stil, Tage);
}

window.onload = loadStyle; //wenn jQuery: alles umbauen

// Cookie-Funktionen

function setCookie(name, value, expdays) {   // gueltig 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;
}