function setStyle(which) {
  var i, s, main;
  for(i=0; (s = document.getElementsByTagName("link")[i]); i++) {
    if(s.getAttribute("rel").indexOf("style") != -1 && s.getAttribute("title")) {
      s.disabled = true;
      if(s.getAttribute("title") == which) s.disabled = false;
    }
  }
}


function getStyle() {
  var s;
  for(var i=0; (s = document.getElementsByTagName("link")[i]); i++) {
	if(s.getAttribute("rel").indexOf("style") != -1 && s.getAttribute("title") && !s.disabled)
		return s.getAttribute("title");
  }
  return null;
}

function getPreferredStyle() {
  var i, s;
  for(i=0; (s = document.getElementsByTagName("link")[i]); i++) {
    if(s.getAttribute("rel").indexOf("style") != -1 &&
	   s.getAttribute("rel").indexOf("alt") == -1 &&
	   s.getAttribute("title"))
		 return s.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 : getPreferredStyle();
  setStyle(title);
}

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

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyle();
setStyle(title);