var imageStatus;

function imageToggle(action){
 imageStatus = action;
 var style = document.getElementById('imageToggle');
 if(action == 'on' && style){
   style.parentNode.removeChild(style);
 } else if(action == 'off' && !style) {
  style = document.createElement('style');
  style.setAttribute('type','text/css');
  style.id = 'imageToggle';
  style.innerHTML = 'img { display:none; } * { background-image:none !important; }';
  var head = document.getElementsByTagName('head')[0];
  head.appendChild(style);
 }
 return false;
}

setEventListener(window,'load',setImageSettings,true)
setEventListener(window,'unload',saveImageSettings,true)

function setEventListener(item,event,func,bool) {
 if(item.addEventListener){
   item.addEventListener(event,func,bool);
 } else {
  item.attachEvent('on'+event,func,bool);
 }
}

function setImageSettings(){
  var cookie = readCookie("image");
  imageToggle(cookie);
}

function saveImageSettings(){
  createCookie("image", imageStatus, 365);
}