var font_save_cookie = "fontsize";

/* -----------------------------------------------------------------------*/
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 setCookie (name, value, path, domain, secure) {
    var expires = null;
    var curCookie = name + "=" + escape(value) + (expires ? "; expires=" + expires : "") + (path ? "; path=" + path : "") + (domain ? "; domain=" + domain : "") + (secure ? "secure" : "");
    document.cookie = curCookie;
}

/* -----------------------------------------------------------------------*/
function getCookie (name) {
    var prefix = name + '=';
    var c = document.cookie;
    var nullstring = '';
    var cookieStartIndex = c.indexOf(prefix);
    if (cookieStartIndex == -1)
        return nullstring;
    var cookieEndIndex = c.indexOf(";", cookieStartIndex + prefix.length);
    if (cookieEndIndex == -1)
        cookieEndIndex = c.length;
    return unescape(c.substring(cookieStartIndex + prefix.length, cookieEndIndex));
}

/* -----------------------------------------------------------------------*/
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 'default';
}

/* -----------------------------------------------------------------------*/
AddEvent(window, "load", function() {
    var cookie = getCookie(font_save_cookie);
    var title = cookie ? cookie : getPreferredStyleSheet();
    if (title == 'null') title = 'default';
    setActiveStyleSheet(title);
});

AddEvent(window, "unload", function() {
    var title = getActiveStyleSheet();
    setCookie(font_save_cookie, title, '/', '', '');
});


/* -----------------------------------------------------------------------*/
function AddEvent(targetObj, eventName, eventHandler) {
    if (document.addEventListener){
        targetObj.addEventListener(eventName, eventHandler, false);
        return;
    }
    if (document.attachEvent){
        targetObj.attachEvent("on"+eventName, eventHandler);
    }
}

var cookie = getCookie(font_save_cookie);
var title = cookie ? cookie : getPreferredStyleSheet();
if (title == 'null') title = 'default';
setActiveStyleSheet(title);