How do i avoid forms sending on enter?

Hi!

I’m building a form, using Pro Forms - and i have a problem with it.

When users click Enter/Return is seems to just send the form, in whatever state it is in.

How do i :

a: Make sure the fields are validated
b: Make sure the form is only sent when the users clicks the Submit button?

Here is the form in question: Post event - The Jungle List

Cheers,

Kristoffer