Help with implementing javascript to validate the form.

Note: the validate form function is the only function that should interact directly with the form fields.

Don't know how to get it to work. Also imported script in html

Zip: index.html x script.js x 1 2 3 function validate Form() { let e document.getElementById("zip"); function testNumber (value) M if (!NaN(value) { return true; else { return false; } }