I have a form - textarea (namedsu) and submit button.

After submitting the form, I need

1. Run PHP script without refreshing/leaving the page
2. "echo" or print the return in some way on the screen

I'm pretty sure this can be achieved with some kind of ajax request. But I don't know what to do.

Like I said, I have no education in ajax or java. A simple example would be great.