Is it possible to make a button that when clicked, copies text from a box.
Instead of manually selecting the contents and then copying with something like control+c.
I don't know if this is possible with html alone, could anyone help?

Maybe, but you're going to need some scripting if it can be done, such as PHP.

Not with HTML alone, but you can add a bit of javascript to get it working.
Take a look at this:
http://www.htmlgoodies.com/beyond/ja...le.php/3458851