console.log in chrome/ff is asynchronous and objects that are logged are interpreted at the time when they're expanded. . Instead make a copy of the object if you want to see its value at that time (for an array):
t=[0,2];
console.log(t.slice(0));
t[0]+=2;
console.log(t);
With an array, calling .slice will duplicate the array and not create a reference.
I wouldn't suggest using a time out: this really doesn't solve the problem, just circumvents it temporarily.
