how to get and search a html file from a website

[Tracubik]

Hi all!
i'm writing a notification program and i'm quite new to python.
The program have to check every 5 minutes a particular website and alert 
me when a particular sentence ("user online") is in the html.
i've thinked to use a text browser (lynx) to retrieve the html and parse 
the output in python as a normal text file.
Do you have any better idea?

thanks
Medeo