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, 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 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);