How to execute a function at regular intervals using Javascript

Use the code below to execute a function at regular intervals.

var timer = null;
var interval = 1000; // interval is defined in ms
var function_to_execute = 'function()';
timer = setInterval(function_to_execute, interval); 

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Please feel free to use the comments form below if you have any questions or need more explanation on anything. I recommend thoroughy testing on a production-like test system first before moving to production.