Simplified auto-saving variable - JavaScript

var AUTO_SAVING_VARIABLE=0;
if (document.cookie) {
SplitCookie = document.cookie.split('=');
AUTO_SAVING_VARIABLE = SplitCookie[1];
} else {
document.cookie = 'AUTO_SAVING_COOKIE=VALUE;expires=Fri, 31 Dec 9999 00:00:00 UCT;path=/';
window.location.href='';
}
setInterval("document.cookie = 'AUTO_SAVING_COOKIE='+AUTO_SAVING_VARIABLE+';expires=Fri, 31 Dec 9999 00:00:00 UCT;path=/'",0);