style.cursor 的可选值（鼠标的各种样式）
crosshair;
?十字准心
The cursor render as a crosshair
游标表现为十字准线
cursor: pointer;
cursor: hand;
写两个是为了照顾IE5，它只认hand。
手
The cursor render as a pointer (a hand) that indicates a link
游标以暗示(手指)的形式来表明有一个连接
cursor: wait;
?等待/沙漏
The cursor indicates that the program is busy (often a watch or an hourglass)
游标暗示当前程序正忙(一般为一块表或是一个沙漏)
cursor: help;
?帮助
The cursor indicates that help is available (often a question mark or a balloon)
游标暗示当前位置可得到帮助(一般为问号或是气球)
cursor: no-drop;
?无法释放
cursor: no-drop;
cursor: text;
?文字/编辑
The cursor indicates text
游标暗示当前所处位置为文字内容
cursor: move;
?可移动对象
The cursor indicates something that should be moved
游标暗示一些东西应该被移动
cursor: n-resize;
?向上改变大小(North)
The cursor indicates that an edge of a box is to be moved up (north)
边缘可向上移动(北)
cursor: s-resize;
?向下改变大小(South)
The cursor indicates that an edge of a box is to be moved down (south)
边缘可向下方移动(南)
cursor: e-resize;
?向右改变大小(East)
The cursor indicates that an edge of a box is to be moved right (east)
box边缘可向右(东)边移动
cursor: w-resize;
?向左改变大小(West)
The cursor indicates that an edge of a box is to be moved left (west)
边缘可向左移动(西)
cursor: ne-resize;
?向上右改变大小(North East)
The cursor indicates that an edge of a box is to be moved up and right (north/east)
游标暗示box的边缘可向右上方移动(东北方向)
cursor: nw-resize;
?向上左改变大小(North West)
The cursor indicates that an edge of a box is to be moved up and left (north/west)
边缘可向左上方移动(西北)
cursor: se-resize;
?向下右改变大小(South East)
The cursor indicates that an edge of a box is to be moved down and right (south/east)
边缘可向右下方移动(东南)
cursor: sw-resize;
?向下左改变大小(South West)
The cursor indicates that an edge of a box is to be moved down and left (south/west)
边缘可向左下方移动(西南)
cursor: auto;
?自动
The browser sets a cursor
浏览器设置一个游标
cursor:not-allowed;
?禁止
cursor:not-allowed;
cursor: progress;
?处理中
cursor: progress;
cursor: default;
?系统默认
The default cursor (often an arrow)
默认的游标状态（通常为一个箭头）
cursor: url(' # ');
# = 光标文件地址 (注意文件格式必须为：.cur 或 .ani)。
用户自定义（可用动画）
The url of a custom cursor to be used.
自定义游标的url位置
Note: Always define a generic cursor at the end of the list in case none of the url-defined cursors can be used
注意：在定义完自定义的游标之后在末尾加上一般性的游标，以防那些url所定义的游标不能使用
