layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600 layerType: background only
layer at (8,8) size 160x32
  RenderBlock (positioned) zI: -1 {DIV} at (8,8) size 160x32 [bgcolor=#FF0000]
layer at (0,0) size 800x600 layerType: foreground only
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x584
      RenderBlock {DIV} at (0,0) size 784x36 [bgcolor=#00FF00] [border: (1px solid #00FF00)]
        RenderBlock {FORM} at (1,1) size 782x18
          RenderText {#text} at (0,0) size 665x18
            text run at (0,0) width 665: "There should be no red on this page. Form element should have border-bottom set to 1em in quirks mode."