//$Id: styleswitcher.js 1081 2007-07-26 09:59:11Z ingvig $
//(c) Siminn.is
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 readStyleOnLoad() {
  var cookie = readCookie("r3style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}
function saveStyleOnUnload() {
  var title = getActiveStyleSheet();
  createCookie("r3style", title, 365);
}
Event.observe(window, 'load', readStyleOnLoad, false);
Event.observe(window, 'unload', saveStyleOnUnload, false);


var cookie = readCookie("r3style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

function swapStylesheets() {
	if (getActiveStyleSheet() != 'High contrast') {
		setActiveStyleSheet('High contrast');
	} else {
		setActiveStyleSheet('default');
	}
}