How to change browser focus from one tab to another

Question

I have a JavaScript chat client running in one browser tab (call it tab A). Now when a message arrives the user might be on another browser tab (call it tab B). I\'m looking

Answer 1

The best you could would probably be to change the title of the page alerting the user the tab needs attention (maybe also the favicon - look at how meebo does it, it's really annoying but effective)