function setContrast() {
	
	var c = document.getElementById("contrast");
	if(blContrast){
		blContrast = false;
		c.className = c.className.replace("active","");
	} else {
		blContrast = true;
		c.className = "active";
	}

	setActiveStyleSheet(getActiveStyleSheet());
	return blContrast;	
}

function setActiveStyleSheet(title) {
	var i, a, main;
	var aFont = document.getElementById(title);
	var s = document.getElementById("small");
	//var m = document.getElementById("medium");
	var l = document.getElementById("large");
	var c = document.getElementById("contrast");
	
	if(aFont != null) {
		s.className = s.className.replace("active","");
		//m.className = m.className.replace("active","");
		l.className = l.className.replace("active","");
		aFont.className = "active";
		if(blContrast)c.className = "active";
	}
	
	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;
			if(blContrast && a.getAttribute("title") == "contrast") 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;
  return "small";
}

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;
}

function initStyleSwitcher(){
	var cookie = readCookie("style");
	var cookie2 = readCookie("styleContrast");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

/* ------------------------------------------------------- */

function addEvent(obj, evType, fn){
	if (obj.addEventListener){
		obj.addEventListener(evType, fn, true);
		return true;
	} else if (obj.attachEvent){
		var r = obj.attachEvent("on"+evType, fn);
		return r;
	} else {
		return false;
	}
}

/* ------------------------------------------------------- */

addEvent(window, "load", initStyleSwitcher);

/*if (window.addEventListener) //DOM method for binding an event
	window.addEventListener("load", initStyleSwitcher, false)
else if (window.attachEvent) //IE exclusive method for binding an event
	window.attachEvent("onload", initStyleSwitcher)
else if (document.getElementById) //support older modern browsers
	window.onload=initStyleSwitcher*/

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

var cookie = readCookie("style");
var cookie2 = readCookie("styleContrast");

if(cookie2 == "false" || !cookie2){
	var blContrast = false;
} else {
	var blContrast = true;
}

var title = cookie ? cookie : getPreferredStyleSheet();

setActiveStyleSheet(title);