is there a program that does this???

Is there a program of any sort that would give me all of the directories of a web site...

like if i give them something like http://www.something.com

it would give me something like

http://www.something.com/3/
http://www.something.com/2/
http://www.something.com/1/

or is there a way i can find out this kind of stuff on my own?


Thanks for anything...