TimeObserver

This Class allows you to create a site observer that fires a callback when a certain time has passed. This is usful for applications that need to fire reminders.

How to use

Usage is fairly simple -

#JS
var to = new TimeObserver;

var time = 6000 + +new Date();

to.addTime(time,function(){
    alert('time is near!');
});

to.start();

For more info read the docs