Help Me Commission A Script

I frequently visit a number of sites, to submit URLs for pinging, joining URLs to create RSS feeds, etc.

I fill out the same 3 or 4 fields with the same niche information each time, more or less. But for different URLs, or a different list of URLs.

I figure a script of some sort could do this for me, but I don't have enough knowledge to know what code it should be done in, or what to call it. Which makes commissioning rather difficult.

Of course, there is probably an app out there somewhere which might automate this process for me but, again, I don't know where to start.

All I need the script to do is:
1. visit a URL
2. fill out fields a, b, c and d from a list, or text file
EG
--- Field a: url1
--- Field b: niche1
--- Field c: description1
3. click 'ok'
4. run again x50 for each (steps 1-4) after a specific time period has passed (which is simpler than creating a script to see when the process has finished)

Any ideas what to call this?
Any ideas what code/script should be used to create it?
Any ideas if anything currently exists which I could use, or adapt for purpose?

Thanks.