//ALL CREDITS TO HTTP://WWW.ALISTAPART.COM
	
function addEvent(o,e,f){if(o.addEventListener){o.addEventListener(e,f,true);return true;}else if(o.attachEvent){return o.attachEvent("on"+e,f);}else{return false;}}

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 setVisibility(visibleLink, hiddenLink) {
    var vs = document.getElementById(visibleLink);
    var hd = document.getElementById(hiddenLink);

    if (vs && hd) {
        //switch visibility
        vs.className = 'hidden';
        hd.className = 'visible';
    }
    
}
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;
}

setCook = function setAcordCook() {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}
addEvent(window, 'load', setCook);

storeCook = function storeAcordCook() {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}
addEvent(window, 'unload', storeCook);