How do you handle multiple instances of setTimeout()?

Question

What is the most recommended/best way to stop multiple instances of a setTimeout function from being created (in javascript)?

An example (psuedo code):

Answer 1

You can set a global flag somewhere (like var mouseMoveActive = false;) that tells you whether you are already in a call and if so not start the next one. You set the flag just before you enter the setTimeout call, after checking whether it's already set. Then at the end of the routine called in setTimeout() you can reset the flag.