Field Validation Upon Submission

I have a form with a couple Required Fields that have required formatting scripts included.

For instance, I have a field for an email address with a script that gives them an error if a valid address is not inserted. I also have a field for a phone number where they need follow a specific format. If they do not, they get a warning.

However, they can choose to ignore the warnings that appear when they enter incorrect information and carry on to the next fields in the form.

My question is... how can I ensure that the form will not be submitted UNLESS they correctly fill out the 2 fields mentioned above?

As it is now, the form will submit regardless of what they include in the fields.

Do I need to program the specific fields in question to absolutely reject anything that is incorrect?

Thank you,