父容器外部的CSS选择器

Question

我想在一个ID为mousehover的元素上应用一些CSS到另一个类中的元素。我不想使用JS。

例子：

<div class="parent"> 
    <div id="parent_1">parent_1</div> 
    <div id="parent_2">parent_2</div> 
    <div id="parent_3">parent_3</div> 
</div> 

<div class="another_parent"> 
    <div id="another_parent_1">another_parent_1</div> 
    <div id="another_parent_2">another_parent_2</div> 
    <div id="another_parent_3">another_parent_3</div> 
</div> 

<style>#parent_3:hover #another_parent_3 {color: red;}</style> 

的jsfiddle：http://jsfiddle.net/CvT6U/

Answer 1

这是不可能的。按照CSS3规格：

http://www.w3.org/TR/css3-selectors/#selectors

E F an F element descendant of an E element 
E > F an F element child of an E element 
E + F an F element immediately preceded by an E element 
E ~ F an F element preceded by an E element 

Answer 2

你能不能用一般的兄弟选择？

＃parent_3：悬停〜＃another_parent_3 {颜色：红;}

http://learn.shayhowe.com/advanced-html-css/complex-selectors/#sibling-selectors