A nice little reg exp from the ColdFusion Cookbook when you need to make sure a users new password (which they are setting) contains at least 1 letter and 1 number.
You can also make sure the password length is within a range, the following makes sure the password is between 6 and 15 characters long.
Don’t you just love regular expressions 
how can i find my password of that mail?
Umutoni Yvette
April 27th, 2007
Sorry Umutoni but I don’t understand your question. Could you please clarify?
Michael Sharman
April 27th, 2007