// Für das austauschen der Stylesheets


var activeStylesheet = "standard";

// Links dafür Anzeigen im Original
function showArea()
{
	if (document.getElementById("cssSwitcher").style.display == "none")
		{ 
		   document.getElementById("cssSwitcher").style.display = "block";
		   document.getElementById(activeStylesheet).focus();
		}
    else
		{
			document.getElementById("cssSwitcher").style.display = "none";
		}
}

// Links dafür Anzeigen angepaßt für onMouseOver und OnMouseOut
function showArea2()
{
	   document.getElementById("cssSwitcher").style.display = "block";
}

function closeArea()
{
	   document.getElementById("cssSwitcher").style.display = "none";
}


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;
    }
  }
  /* Aktives Stylesheet merken */
  activeStylesheet = title;
}

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);
  //alert ("Aktives Stylesheet: "+title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);