Answering machine script

...there is no manual. The only thing I with my noob scripting skills can see is:
// This script keeps a list of messages.
// The owner can play the messages back and erase them.
...whatever that means...!?

Later on there's another comment:
// Listen to a single line, spoken by the person who pressed
// the "Leave Message" button.

There is no f*cking button! I bought a script. I've put it into a box to test it. I can't click that box (button?), nothing happens. Feels like it's been ripped from another item, but it's just my opinion on that.