function setActiveStyleSheet(title1, title2) {
  var i, a, main;

  if (title1 == "" || title2 == "") {
	  var title = getActiveStyleSheet();
	  var listArray = title.split("-");
	  if (title1 == "") {
		title1 = listArray[0];
	  } else {
		title2 = listArray[1];
	  }
	  //alert('setActiveStyleSheet: '+title1+' '+title2);
  }
  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") == (title1+"-"+title2)) 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 "medium-medium";
}

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 "medium-medium";
}

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();
  var listArray = title.split("-");
  //alert('onload: '+title);
  setActiveStyleSheet(listArray[0], listArray[1]);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  //alert('createCookie: '+title);
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
var listArray = title.split("-");
setActiveStyleSheet(listArray[0], listArray[1]);