I don't know if you took the file out of your action on purpose or not. But your form doesn't have an action at all. It simple says
I'm not fluent in JavaScript, but I would look into submitting forms using PHP and JavaScript.
You can declare what php file to use as the action in your JavaScript. Which in your case should be helpful.
Take a look at this tutorial.
http://www.askaboutphp.com/213/php-a...-the-page.html
Maybe you can take some ideas from this, and apply it to your code. Looking through your script it shouldn't be too hard.
If it were me I would write most of the validation stuff you've got in form-top.js as PHP, and use JavaScript only for submitting the form. But that's just me.
A nice Ajax contact form tutorial is over at
http://tutorialzine.com/2009/09/fancy-contact-form/
They;ve gone in a little bit different of a direction than you, but it's a pretty nice script.