//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) {
  var i, a, a1, a2, a3, a4, 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;
    }
  }
  // swap button images
  a1 = document.getElementById('z10');
  a2 = document.getElementById('z12');
  a3 = document.getElementById('z14');
  a4 = document.getElementById('z16'); 
  active = getActiveStyleSheet();
  switch (active) {
	case 'A++' :
		a1.src = '/images/z10.gif';
		a2.src = '/images/z12.gif';
		a3.src = '/images/z14.gif';
		a4.src = '/images/z16_on.gif';
		break;
	case 'A+' :
		a1.src = '/images/z10.gif';
		a2.src = '/images/z12.gif';
		a3.src = '/images/z14_on.gif';
		a4.src = '/images/z16.gif';
		break;
	case 'A' :
		a1.src = '/images/z10.gif';
		a2.src = '/images/z12_on.gif';
		a3.src = '/images/z14.gif';
		a4.src = '/images/z16.gif';	
		break;
	case 'A-' :
		a1.src = '/images/z10_on.gif';
		a2.src = '/images/z12.gif';
		a3.src = '/images/z14.gif';
		a4.src = '/images/z16.gif';	
		break;
	default :
		a1.src = '/images/z10.gif';
		a2.src = '/images/z12_on.gif';
		a3.src = '/images/z14.gif';
		a4.src = '/images/z16.gif';	
		break;
  }
}

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 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);