el.class (red), el .class (green) (错误显示 IE67/Win, IE/Mac and Op7-)
el .class (red), el.class (green)
el.class (red), el el .class (green)
.class el (red), el .class (green) (错误显示 IE67/Win, IE/Mac and Op7-)
el .class (red), .class el (green)
#id el (red), el #id (green) (错误显示 IE67/Win, IE/Mac and Op7-)
el #id (red), #id el (green)
:first-letter测试
X .class
X el.class el.class el.class
X #id (first letter wrong in IE7-/Win)
X el.class el.class
X #id
wrong in IE7-/Win