post form values to a phpgd script without refreshing the pa

I am NOT good with server-side technologies (have a hard time wrapping my mind around them at points). I am pretty decent with PHP. I have a form that offers color options (now in drop-down format, but...

CSS Height: Fill available space. No fixed heights

So i have the following structure I am only using the ids for illustration purposes so this is not even necessarily for a full page.I want my container to specify a fixed size… or a relative size,...