simpleButton() using library resoucres

I have the images that I want to use for the button in the library, using simpleButton(), how do I link the parameters of that function to the library resources?

I also have a button already made, would it be easier just to create an instance of that in the ActionScript? If so how would I do that?

Edit:

Even when I try this, I get errors:


var createNew:SimpleButton = new SimpleButton();

			  createNew.upState = newoff;
			  createNew.overState = newon;
			  createNew.downState = newon;
			  addChild(createNew);