regular expression question

Hi, I am trying to match anystring that contians either, for example dir3 or lets say dir12, but if I do "dir[0-9]" I only match if it's dir3 and if I do dir[0-9][0-9] I only get a match if it's dir12. How can I tell it to match either or? I have tried a few different options but none seem to work. If there is a regular expression guru out there. I am sure this is an easy question I just have been beating it to death and haven't seem to get there... Thanks Ken http://cleveland.lug.net/~rocket/ The answer is simple if you grant that ironies are like submarines; dangerous only when submerged.