function fontsizeup() {
  active = getActiveStyleSheet();
  switch (active) {
    case 'A--' : 
      setActiveStyleSheet('A-');
      break;
    case 'A-' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A++');
      break;
    case 'A++' :
      break;
    default :
      setActiveStyleSheet('A');
      break;
  }
}

function fontsizedown() {
  active = getActiveStyleSheet();
  switch (active) {
    case 'A++' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
      setActiveStyleSheet('A-');
      break;
    case 'A-' : 
      setActiveStyleSheet('A--');
      break;
    case 'A--' : 
       break;
    default :
      setActiveStyleSheet('A--');
      break;
  }
}

function setActiveStyleSheet(title)
{
	links = document.getElementsByTagName('link');
	for(var i = 0; i < links.length; i ++)
	{
		if(links[i].getAttribute('title') == 'A--' ||
		 links[i].getAttribute('title') == 'A-' ||
		 links[i].getAttribute('title') == 'A++' ||
		 links[i].getAttribute('title') == 'A+' ||
		 links[i].getAttribute('title') == 'A'
		)
			links[i].disabled = true;
			
		if(links[i].getAttribute('title') == title)
		{
			links[i].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){ 
//		alert(a.getAttribute("title"));
		return a.getAttribute("title");	
	}
  }
  return null;
}*/
function getActiveStyleSheet()
{
	var title = '';
	links = document.getElementsByTagName('link');
	for( var i = 0; i < links.length; i++)
	{
		if(links[i].getAttribute('title') == 'A--' ||
		 links[i].getAttribute('title') == 'A-' ||
		 links[i].getAttribute('title') == 'A++' ||
		 links[i].getAttribute('title') == 'A+' ||
		 links[i].getAttribute('title') == 'A'
		) {
			if(!links[i].disabled)
			{
				title = links[i].getAttribute('title');	
			}
		}
	}
	return title;
}

function getPreferredStyleSheet() {
  return ('A-');
}

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;
}
function disableAll()
{
links = document.getElementsByTagName('link');
  for(var i = 0; i < links.length; i++)
  {
	if(links[i].getAttribute('title') == 'A--' ||
		 links[i].getAttribute('title') == 'A-' ||
		 links[i].getAttribute('title') == 'A++' ||
		 links[i].getAttribute('title') == 'A+' ||
		 links[i].getAttribute('title') == 'A'
	)
		links[i].disabled = true;
		
	if(links[i].getAttribute('title') == 'A-')
		links[i].disabled = false;
  }
}
function addEvent(obj, evType, fn){ 
 if (obj.addEventListener){ 
   obj.addEventListener(evType, fn, false); 
   return true; 
 } else if (obj.attachEvent){ 
   var r = obj.attachEvent("on"+evType, fn); 
   return r; 
 } else { 
   return false; 
 } 
}
addEvent(window, 'load', disableAll);

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
if (title == 'null') {
  title = getPreferredStyleSheet();
}
function myLoad()
{
	setActiveStyleSheet('A-')
}
addEvent(window, 'load', myLoad);