i'd really love a tutorial that lets me highlight text in a text area, and click a button that puts bold / italic / underline / code tags etc around it.

Or just somewhere to start to look and understand it.

Just like phpbb does it really i guess.

I know php only - if its not possible in php, what do i do it in?

I'm making a very complex php cms - and i need to make my posting interface more professional.

What i'm looking for is either

1) a template tutorial on how to do it. I.e. the methods used to bold text - which i can then adapt to work with urls and other features.

or, if its all in php

2) a pre made bit of script that i can look at and understand