是否可以使用CSS3选择器:first-of-type选择具有给定类名的第一个元素？我的测试没有成功,所以我认为不是吗？
守则(http://jsfiddle.net/YWY4L/):
p:first-of-type {color:blue}
p.myclass1:first-of-type {color:red}
.myclass2:first-of-type {color:green}<div>
<div>This text should appear as normal</div>
<p>This text should be blue.</p>
<p class="myclass1">This text should appear red.</p>
<p class="myclass2">This text should appear green.</p>
</div>