[flexcoders] Generating Random key

[anuj181]

Hi 
I need to work on a piece of code in which whenever user clicks on the
button , the code should generate random 12 character key having all
caps and no vowels in the format of XXX-XXX-XXX-XXX. Can anybody guide
me in this direction. Is there any built in function for that or do I
have to use my own logic for random generation in this specific case.
Any help will be appreciated.
Thanks
Anuj