Why call the enableSubmitEvent function at the bottom of the script?

This was posted earlier by Jason Anello, a fellow student.

"The enableSubmitEvent() function is called once on page load. This is to essentially disable the submit button since all the inputs are blank when the page first loads..."

"That function is responsible for either enabling or disabling the submit button. So if you never call it again then you won't be able to enable the submit button..."

"The idea behind .keyup(enableSubmitEvent) is that as the user is typing you can repeatedly call that function to see whether the submit button should be enabled or not..."

"You don't know what keyup is finally going to be the one where all the validation passes so you call the enableSubmitEvent every time a key goes up..."

Hope this helps