Need help with bidirectional AJAX requests

The idea is very simple, I'm new to Contruct 2 engine and hence would really appreciate some help. The game that I'm making suppose to get a custom form via AJAX. I have written the PHP page that serves this form (for now it just echoes a simple text), and then created an AJAX request in the game. I have assigned a textbox to receive the PHP output, and it does so flawlessly. My question is this:

• How can I make a custom HTML form retrieved from AJAX fill up the screen and not just a textbox? (I can make an HTML page that is 640x480, add custom CSS for the rounded-corner background and some text, input fields and a submit button)
• If I'll be able to show my custom formatted HTML page, I can make it come with it's own AJAX handler (jQuery) that would handle a submit form action. So my second question is upon pressing this submit button, how do I get back to the game? Is there any way to bind an external call to continue or quit the game?

P.S. This might also sound like a silly question, but I wasn't able to figure out how to quit the game upon certain events (when a player wins or looses for example). The only way I could think of was to destroy player. Is there an easier way?

Thanks again, I really enjoy coming to these forums, so much talent! =)

It depends what "quitting the game" means to you. Closing the browser window?

No, quitting as in stopping the game from running (monsters from spawning, player/world from existence, etc). Any ideas?

p.s. but this a separate topic on it's own, I would really like to get some help on the AJAX question.

Thanks again.

For the quitting problem

-> Monster: Destroy

-> System: set timescale to 0

Should work

For the other question... dunno, go see the plugin section in the forum, there's a list, maybe stuff like callJS or Jessejoh's HTML Elements pack could help.

Ashley may have some answer for _MD_'s question about AJAX in the first post.

If you're returning HTML to an AJAX request, Construct 2 can't do anything with that - you can't load HTML in Construct 2. You could try the iframe plugin and just show the URL in an iframe, or use CallJS to open it in a popup window.