sending a text message via webpage button

[John]

Can anyone help me in coding a script that can send a text message
typed to
the script like.

sendmessage 6318019564 "test message"

What I want to do is fill up this information on this webpage

http://www.cingularme.com/do/public/send;jsessionid=aKDwXM1S0Reh

and click the submit button using the python script. Any ideas on
how to do this or if someone has already done this?

Thanks,
--j