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layer at (0,0) size 800x53
  RenderBlock {HTML} at (0,0) size 800x53
    RenderBody {BODY} at (8,16) size 784x21
      RenderBlock {P} at (0,0) size 784x21
        RenderButton {BUTTON} at (0,0) size 531.02x21 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
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              text run at (0,0) width 516: "Activating (e.g. holding the mouse button down on) this button should make it go green."