I am using Quickform and one of my fields is a telephone number field. I pull this from an array field.

phone=>1234567890

In my quickform object, this is how I set it up.
PHP Code:
$form->addElement('text','phone','Phone:'); 
It displays as...
Phone: 1234567890

I am able to retrieve the phone number as 10 digits, but when I display this value in Quickform, instead of seeing as 10 digits, how can I display as:

Phone: (123) 456-7890

I cant find any documentation how I can alter the format of the telephone number.

Thanks in advance for your assistance.