/************* Cookie Verwaltung **************/
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;
}
// ----------------------------------------------
// StyleSwitcher functions written by Paul Sowden
// http://www.idontsmoke.co.uk/ss/
// - - - - - - - - - - - - - - - - - - - - - - -
// For the details, visit ALA:
// http://www.alistapart.com/stories/alternate/

function setActiveStyleSheet(title) {
  var i, a, setName;
  if(title.indexOf("set1") != -1){
	  setName = "set1";
  } else if(title.indexOf("set2") != -1){
	  setName = "set2";
  }
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("stylesheet") != -1 && a.getAttribute("title")) {
		if(a.getAttribute("title").indexOf(setName) != -1){
			a.disabled = true;
			if(a.getAttribute("title") == title) a.disabled = false;
		}
    }
  }
}

function getActiveStyleSheet() {
  var i, a, styleName1, styleName2;
  var zaehler1 = 0;
  var zaehler2 = 0;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("stylesheet") != -1 && a.getAttribute("title") && !a.disabled) {
		zaehler1++;
	}
  }
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("stylesheet") != -1 && a.getAttribute("title") && !a.disabled) {
		zaehler2++;
		if(a.getAttribute("title").indexOf("set1") != -1){
			styleName1 = a.getAttribute("title");
		}
		else if(a.getAttribute("title").indexOf("set2") != -1){
			styleName2 = a.getAttribute("title");
		}
		if (zaehler2 == zaehler1){
			//alert(styleName1+'/'+styleName2);
			return styleName1+'/'+styleName2;
		}
		
	}
  }
  return null;
}

window.onload = function(e) {
	var cookie = readCookie("style");
	var title = cookie ? cookie : null;
	if(cookie){
		if (title != 'null'){
			var cookieInhalt = new Array();
			cookieInhalt = title.split('/');
			eintraege = cookieInhalt.length;
			for(i=0;i<=eintraege-1;i++){
				if (cookieInhalt[i] != "undefined") {
				setActiveStyleSheet(cookieInhalt[i]);
				}
			}
		}
	}
}


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