My ISP uses a html client , So to do a 'login' i have to goto a page like this:
http://203.122.xx.xxx:8886/portalcgi...=00:xx.xx.x..x..
fill-in the username,password and thats it!
The trouble is that this has to be done after every 30 minutes of inactivity , and this totally confuses my computer-noob parents

So i was wondering if I could automate this. i.e run a lil program that would go the specified page a fill in the username and password fields

The first that comes to my mind are those spam-bots that are able to fill in forms, wreak comment systems. Unfortuantely I am anything but leet, so i have really no idea how to even begin. i am not a programmer though I am aware of basics of plenty of languages, so i could probably write something myself if there is a lil help.

Any suggestions?

relevant code from the source code.
Code:
<td > <input type="text" id="username" name="username" value="">
Thanks