9. 11

list box
<ol> <ul>
Lisd-style
Remove the front ordinal of the list
Formatting and layout
Position
Position
Fixed fixing
Fixed relative to browser border
Absolute
Relative to the parent element (browser, absolute positioning of the ancestor)
Relative
Relative position, relative to its original position
Top,left,right,bottom
Adjust position
<style type= "Text/css" >
*{margin::0px Auto; padding:0px;}
</style>
Flow
Float
Left
Right
Clear:both
Flow end, to clear the stream
Z-index Layering
The larger the value, the higher the
Used in conjunction with position float

9. 11