How to make form submission with ajax handling

How can i make this form ready for submission with ajax?
-> Problem, when the name field is filled in and I send the form (it checks if the all the fields are filled in), the name field becomes empty again. While it must contain what i putted in this field before.

Can someone help me?

Here’s the form:

Check out this tutorial, it refers to the Uniform Kirby plugin but might help with “ajaxifying” the basic Kirby form as well.