语法:
E:first-of-type : {attribute}
相关伪类: E:root | E:nth-child(n) | E:nth-last-child(n) | E:nth-of-type(n) | E:nth-last-of-type(n) | E:last-child | E:only-child | E:only-of-type | E:empty
说明:
匹配同级兄弟元素中的第一个E元素
兼容性:
| 类型 | 
 Internet Explorer | 
				  
 Firefox | 
				  
 Chrome | 
				  
 Opera | 
				  
 Safari | 
				
|---|---|---|---|---|---|
| 版本 | (×)IE6 | (×)Firefox 2.0 | (√)Chrome 1.0.x | (√)Opera 9.63 | (√)Safari 3.1 | 
| (×)IE7 | (×)Firefox 3.0 | (√)Chrome 2.0.x | (√)Safari 4Public beta | ||
| (×)IE8 | (√)Firefox 3.5 | ||||
示例:

        
Internet Explorer
Firefox
Chrome
Opera
Safari