Prevent Enter key from submitting form

Several users have complained that they inadvertently typed the Enter key while filling out  a long form and this resulted in submitting a partial response. Any way to prevent this?

Sorry, I see this is an oft-reported problem. I guess I will put a required field at the bottom of the form with a brief explanation. 

Hi,

You can also add a radio button or checkbox field before the submit button that would ask users to submit the form or not. Then make it a required field.

Thanks