layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x54
  RenderBlock {HTML} at (0,0) size 800x54
    RenderBody {BODY} at (8,16) size 784x22
      RenderBlock {P} at (0,0) size 784x22
        RenderButton {BUTTON} at (0,0) size 520x22 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
          RenderBlock (anonymous) at (8,3) size 504x16
            RenderText {#text} at (0,0) size 504x16
              text run at (0,0) width 504: "Activating (e.g. holding the mouse button down on) this button should make it go green."