Why has this function used in that code?

[Abalfazl]

Hello
Please check this link:
http://www.w3schools.com/js/tryit.asp?f ... tryjs_time
Why has it used this function:
function stop()

[swirlee]

They define the stop() function at the very beginning. All it does is clear the timer.

[ruturajv]

that is just a user function defined...
so that more than clear timer can be done when stop is called