CSS修改鼠标样式
CSS可以修改鼠标样式，即将鼠标移到元素上时，自动切换为其他样式或者自定义图片。
设置属性cursor为各种鼠标形态（把鼠标移到标签上看效果）：
| 标签 | 对应形态 |
|---|---|
| auto | 自动选择 |
| crosshair | 十字选择模式 |
| default | 默认图标 |
| e-resize | 右侧拉伸 |
| help | 帮助图标 |
| move | 十字移动图标 |
| n-resize | 上测拉伸 |
| ne-resize | 右上拉伸 |
| nw-resize | 左上图标 |
| pointer | 手指图标 |
| progress |
默认图标加加载图标 |
| s-resize |
下侧拉伸 |
| se-resize |
右下拉伸 |
| sw-resize |
左下拉伸 |
| text |
文本选择 |
| w-resize |
左侧拉伸 |
| wait |
加载中（沙漏和转圈） |
| url() |
自定义图标(cur文件) |
源代码：
<span style="cursor:auto">auto</span>
<span style="cursor:crosshair">crosshair</span>
<span style="cursor:default">default</span>
<span style="cursor:e-resize">e-resize</span>
<span style="cursor:help">help</span>
<span style="cursor:move">move</span>
<span style="cursor:n-resize">n-resize</span>
<span style="cursor:ne-resize">ne-resize</span>
<span style="cursor:nw-resize">nw-resize</span>
<span style="cursor:pointer">pointer</span>
<span style="cursor:progress">progress</span><br>
<span style="cursor:s-resize">s-resize</span><br>
<span style="cursor:se-resize">se-resize</span><br>
<span style="cursor:sw-resize">sw-resize</span><br>
<span style="cursor:text">text</span><br>
<span style="cursor:w-resize">w-resize</span><br>
<span style="cursor:wait">wait</span><br>
<span style="cursor:url()">url</span><br>
