Removing characters from usernames

[Andrew Zirkel]

Is there a way to parse the input of a username and password before  
it is passed to the back end database?  I'm doing mac address  
authentication and some devices are passing the mac address with  
dashes, where I need to have no separation between the octets.  I  
basically need to strip out these dashes from the input.

Thanks
Andy Zirkel
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