Clarification: When I said "can't find it in the doc", I didn't mean I could not find the doc. I meant I read the doc and did not find an explanation or example that explained how to set the content of arg1.

So, comments like RTFM are worthless to me and anyone else reading this q&a seeking advice and clarification.

This is just a snippet. The simple question "What are you trying to do?" renders the simple reply "To fill & submit a html form." As an example, let's say I'm tyring to fill the search string for the search.cpan.org page and retrieve results.