Newbie to using scripts

I am completely new to using scripts in a pdf. I'm using Adobe Acrobat Pro. The script I need to use, I believe, is found at this link:

http://www.xyplorer.com/xyfc/viewtopic.php?f=7&t=3869

The second part of the script that adds the date to the filename is all I need.

When I open the javascript editor and enter this script, rename b, "*-<date yyyymmdd>", p;

I get this error: Syntax error missing ; before statement

What is the problem, how exactly do I enter that script into the box and, while I'm here, will that script actually do what I need it to do? When you save the document, add the date to the filename? THanks!