javascript regular expression phone number validation

I would like to test if the right phone number was enterred in the text field. The phone number should be ddd-ddddddd which means 3digits then must have "-" and then 7 digits. How do I set the regular expression for that ? T开发者_开发百科hanks :)

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/^\d{3}-\d{7}$/.test( phone_number );

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var phoneNumber = '123-1234567';
if(phoneNumber.match(/^\d{3}-\d{7}$/))
{
   alert('blah');
}

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Exactly as you say it /^\d\d\d-\d\d\d\d\d\d\d$/

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That's my take:

/^[0-9]{3}\-[0-9]{7}$/