How to set 15 mins time interval in java script ?

Quote:

You could use the setInterval function if you want it to run repeatedly:

JavaScript

setInterval(function() {
    alert('hello world');
}, 15 * 60 * 1000);

Also you might take a look at the jquery idleTimer plugin which allows you to detect periods of user inactivity and take some actions.

var logouTimeInterval = 15 * 60 * 1000;