Our SFDC requires phone numbers to be in the following format: (000) 000-0000. Forms on our website automatically manipulate phone numbers to adhere to that requirement, however our forms hosted on Eloqua Landing Pages don't have such validation/manipulation. This is causing some headaches, as customers can enter any phone number and then the integration triggered to SFDC stalls.
Has anyone managed to use some kind of RegEx or JavaScript for such validation or manipulation on the form itself? If not, has anyone used the String Manipulation Cloud Component to clean phone numbers as such?