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;
    }
  }
}

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 swaptocookie(e) {
  if(readCookie("stylesheet") != null) {
	  setActiveStyleSheet(readCookie("stylesheet"));
  }
}
addonload('swaptocookie');

function sheettocookie(e) {
  var title = getActiveStyleSheet();
  setCookie("stylesheet", title, 365);
}
addonunload('sheettocookie');

swaptocookie();

var savesheet = setInterval('sheettocookie()',2000);
function stopcookieupdate() {
		clearInterval(savesheet);
}