I want to be able to create a simple form with an action button.

My specific use-case is to give people an input field and a button that would post to a webserver (call me back form)

I do not want to use iframes for this because it just does not look pretty.

A good basic solution would be a drag and drop form builder with the basic elements and the capability to add a JavaScript function to the submit button.

If this form then would be able to update variables in the room as well would be a huge improvement.