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;
  }
  window.location.reload();
}

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;
  }
  window.location.reload();
}

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() {
  return ("A");
}

function setDefault() {
	setActiveStyleSheet('default');
	window.location.reload();
}

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();
  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();
}

setActiveStyleSheet(title);