I need an expression that works a lot like the [id://####]
thing of the Monks website. My regular expression should take
[id=###]blahblah[/id] and replace it with
<a href="/cgi-bin/coolcode.pl?id=###">blahblah</a>.
I am rather new to the concept of regex, and I have read the manpages in detail,
but had little success in discovering how more "advanced"
regex work. (Such as this one.) Please help me.