Button styling and lack of a visual "clicked" or "depressed" state

Button styling and lack of a visual "clicked" or "depressed" state


1)
I'm a bit mystified by the lack of themed buttons in jQuery UI. I've
rolled my own theme in Steamroller. I've styled my divs with the css
available.
I assumed that just having a button inside a div that had the widget
stuff on it would be enough. Is there css I can put on the button to
have it automatically get appropriate hover and other states on the
button? Or do I have to attach some javascript?
2)
As a side issue, the jQuery UI seems to be lacking a state I expect in
any UI library. There's an inactive, hover, and active, but there's no
"depressed" state for when you've clicked but not yet released. This
makes all jQuery UI stuff seem a little broken, or at least not as
responsive as it should be. Is this a jQuery UI limitation? Or just a
ThemeRoller one?
Try to find a modern OS or app that doesn't have a depressed state.
It's tough.