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;
    }
  }
  
  
  
  if(title == 'normal') {
	  document.getElementById('znormal').src = 'fileadmin/templates/img/zoom/zoom_menu_m_on.gif';
	  document.getElementById('zbigger').src = 'fileadmin/templates/img/zoom/zoom_menu_l_off.gif';
	  document.getElementById('zbiggest').src = 'fileadmin/templates/img/zoom/zoom_menu_xl_off.gif';
	  document.getElementById('header_banner_links').style.backgroundImage = 'url(fileadmin/templates/img/banner/banner_li_normal_tz.jpg)';
	  document.getElementById('header_foto2').style.backgroundImage = 'url(fileadmin/templates/img/banner/banner_re_normal_tz.jpg)';
// 	  document.getElementById('teaser_netzwerk').src = 'fileadmin/templates/img/teaser/lympho-opt_um_lonetz_normal.gif';
	  document.getElementById('teaser_forum').src = 'fileadmin/templates/img/teaser/lympho-opt_um_forum_normal.gif';
	  document.getElementById('teaser_medipay').src = 'fileadmin/templates/img/teaser/lympho-opt_um_medipay_normal.gif';
	  document.getElementById('teaser_verein').src = 'fileadmin/templates/img/teaser/lympho-opt_um_lymphverein_normal.gif';
  }
  if(title == 'bigger') {
	  document.getElementById('znormal').src = 'fileadmin/templates/img/zoom/zoom_menu_m_off.gif';
	  document.getElementById('zbigger').src = 'fileadmin/templates/img/zoom/zoom_menu_l_on.gif';
	  document.getElementById('zbiggest').src = 'fileadmin/templates/img/zoom/zoom_menu_xl_off.gif';
	  document.getElementById('header_banner_links').style.backgroundImage = 'url(fileadmin/templates/img/banner/banner_li_medium_tz.jpg)';
	  document.getElementById('header_foto2').style.backgroundImage = 'url(fileadmin/templates/img/banner/banner_re_medium_tz.jpg)';
// 	  document.getElementById('teaser_netzwerk').src = 'fileadmin/templates/img/teaser/lympho-opt_um_lonetz_medium.gif';
	  document.getElementById('teaser_forum').src = 'fileadmin/templates/img/teaser/lympho-opt_um_forum_medium.gif';
	  document.getElementById('teaser_medipay').src = 'fileadmin/templates/img/teaser/lympho-opt_um_medipay_medium.gif';
	  document.getElementById('teaser_verein').src = 'fileadmin/templates/img/teaser/lympho-opt_um_lymphverein_medium.gif';
  }
  if(title == 'biggest') {
	  document.getElementById('znormal').src = 'fileadmin/templates/img/zoom/zoom_menu_m_off.gif';
	  document.getElementById('zbigger').src = 'fileadmin/templates/img/zoom/zoom_menu_l_off.gif';
	  document.getElementById('zbiggest').src = 'fileadmin/templates/img/zoom/zoom_menu_xl_on.gif';
	  document.getElementById('header_banner_links').style.backgroundImage = 'url(fileadmin/templates/img/banner/banner_li_large_tz.jpg)';
	  document.getElementById('header_foto2').style.backgroundImage = 'url(fileadmin/templates/img/banner/banner_re_large_tz.jpg)';
// 	  document.getElementById('teaser_netzwerk').src = 'fileadmin/templates/img/teaser/lympho-opt_um_lonetz_large.gif';
	  document.getElementById('teaser_forum').src = 'fileadmin/templates/img/teaser/lympho-opt_um_forum_large.gif';
	  document.getElementById('teaser_medipay').src = 'fileadmin/templates/img/teaser/lympho-opt_um_medipay_large.gif';
	  document.getElementById('teaser_verein').src = 'fileadmin/templates/img/teaser/lympho-opt_um_lymphverein_large.gif';
  }
}

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);
}

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