Regular expression validation

["lenny2" <webforumsuser@xxxxxxxxxxxxxx>]

Has anyone figured out a way to use regex in a flash form?? I have tried 
something like this inside cfformitem tags:

 function doRegExpVal():void{
    var p:RegExp = new RegExp("\w")
 }

 the above is correct action script but when used, the CFFORM won't even 
render.  I don't know if it's the 'new' keyword or if cfform just doesnt 
support the RegExp class.  I went to the list of Top Level packages like Array, 
Object, etc... and most of them work. But RegExp won't even let the form 
render. 

 Thanks