layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x57
  RenderBlock {HTML} at (0,0) size 800x57
    RenderBody {BODY} at (8,16) size 784x25
      RenderBlock {P} at (0,0) size 784x25
        RenderButton {BUTTON} at (2,2) size 508x21 [bgcolor=#F0F0F0] [border: (2px outset #F0F0F0)]
          RenderBlock (anonymous) at (8,3) size 492x15
            RenderText {#text} at (0,0) size 492x15
              text run at (0,0) width 492: "Activating (e.g. holding the mouse button down on) this button should make it go green."