How do I add pictures to a post (Non-Attachment)?

[_Rebel_]

I understand this is stupid, but the title says it all.

[Ad Bot]

[Chrono]

[img]http://url here[/img]
example:
[img]http://forum.blockland.us/Themes/Blockland/images/english/home.gif[/img]
would show

[pitfall]

Image Shack
http://imageshack.us/

[_Rebel_]

Its a few screenshots I took to post in the gallery.  No web link...

[_Rebel_]

^Scratch that, I am just going to use imageshack.