i love regular expressions...
"(^(([0-9]{2}|[0-9]{1})(\/|-)([0-9]{2}|[0-9]{4}|[0-9]{1}))$)|(^(([0-9]{4})|([0-9]{6}))$)"
"(^(([0-9]{2}|[0-9]{1})(\/|-)([0-9]{2}|[0-9]{4}|[0-9]{1}))$)|(^(([0-9]{4})|([0-9]{6}))$)"
evanx:
Well...uh...ok. Whatever makes you happy..... 
unique3:
