Javascript - Timer to call button

How do I create a timer within Javascript that will repeatedly call a javascript function every 120 seconds?
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carsRSTAsked:
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nap0leonCommented:
window.setInterval("functionYouWantToCall()",12000);

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carsRSTAuthor Commented:
Thanks!
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Philippe DamervalSenior Analyst ProgrammerCommented:
CarsRST,
Javascript is single-threaded - which means it executes in linear fashion, first call to last call, and while you can delay the execution of a function or repeat a function call indefinitely at regular interval, there can be no true timer in Javascript. At best, you can have a function that is called again after a specific period of time. This post presents the mechanism very well:
http://ejohn.org/blog/how-javascript-timers-work/
However, you can cleverly set things up so that your function is sensitive to the current time, emulating a fairly acceptable version of a timer. This post gives you a good sample script for doing that:
http://mcfedries.com/javascript/timer.asp

Hope this helps,

Philippe
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