Javascript regular expression for phone number validation.(String contains only at least 1 digit, 0 or more spaces and '-'

Question

Currently I have an expression:

numMatches = phone.match(/[^\d\s\-]/gi);

if (numMatches != null) {
    alert(invPhnNo);
}   

This gives an alert if any characters other than digit, space and hyphen are entered. But still accepts if only hyphen and spaces are given without a single digit. Now i would want it to alert if atleast a digit is not there. So a digit is mandatory. Can have zero or more spaces and hyphen and no other characters.

Can anyone suggest an approach to this?

Answer 1

You could either use the standard regexp refered to by Trever, but you could also simply run another .match(/\d+/g) on the string and if both succeed, you can be sure that it complies with your requirements and also has at least one digit.