Regex to allow only digits, hypens, space, parentheses and should end with a digit (javascript) [duplicate]

Question

Possible Duplicate:
US Phone Number Verification

I need to validate US phone number. It could be in the format:

xxx-xxx-xxxx
(xxx) xxx xxxx
(xxx)-xxx-xxxx
xxxxxxxxxx

but it should not be

xxx-xxx-xxxx-
-xxx-xxx-xxxx

It should accept digits, hyphens, space and parentheses.

Currently I use

^\[0-9 \-\. ]+$ 

which does not validate dash at the beginning or end.

Answer 1

^\(?\d{3}\)?[- ]?\d{3}[- ]?\d{4}$

Answer 2

Well my idea is (after some searching) not new at all! Look at this:

A comprehensive regex for phone number validation

This is an Excellent suggestion btw.