Regular Expression for Phone Number

I need a Javascript RegEx through which I can validate phone number. RegEx should handle following criteria

1. It should only consist of numbers ( ) + and -
2. Count of + should not exceed 1
3. Count of - should not exceed 4
4. There must be only one pair of ()
5. If 开发者_开发技巧'(' is present in phone number then ')' must be present.

Thanks for the help!

Hussain.

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Try this:

function valid_phone_number(ph) {
  var regex = /^(?!([^-]*-){5})(\+\d+)?\s*(\(\d+\))?[- \d]+$/gi;
  return regex.test(ph);
}

I'm new to regular expressions, so please be nice. :-)