WebKit私有属性之-webkit-appearance
-webkit-appearance
-----有下列值：
- slider-horizontal --------水平滚动条
- push-button -----按钮
- searchfield -----搜索框
- textfield
- searchfield-cancel-button
- searchfield-decoration
- searchfield-results-decoration
- searchfield-results-button
- list-button
- textarea
Gecko下也有一个-moz-appearance
扩展阅读：