Clicking a button on an web page.

[Dedoleo]

I have read through the tutorials for Python and looked at the web
related stuff. Unfortunately, the tutorials only mention how to use
scripts locally and the web related stuff, well that's local too.

How should I go about writing a script that will simply click a button
on a web page at an interval? For example, if you're familiar with
Neopets, I'd like to click the Collect Interest button around 1am
everyday. :)