html to achieve the mouse hover effect
css写法：
a.hand:hover {cursor:Pointer}
style=“cursor:wait”
cursor other values
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1 auto: Standard cursor
2 default: Standard arrow
3 Pointer: Hand cursor
4 wait: Waiting for cursor
5 text: I-shaped cursor
6 vertical-text: Horizontal I-shaped cursor
7 no-drop: Cursor cannot be dragged
8 not-allowed : Invalid cursor
9 help: Help cursor
10 all-scroll: Triangular direction indicator
11 move: Moving indicator
12 crosshair: Cross indicator
13 e-resize
14 n-resize
15 nw-resize
16 w-resize
17 s-resize
18 se- resize
19 sw-resize