如何使这两个div的高度相同？

Question

我有一些内容组,由两个div组成,两个div包含文本,我希望每组的第二个div与第一个div的高度相匹配.

DEMO

HTML(不幸的是不能更改)

<!-- group one -->
<div class="item">
    .... content here
</div>

<div class="item_open">
    .... content here too
</div>

<!-- group two -->
<div class="item">
    .... completely different content here
</div>

<div class="item_open">
    .... some more content here too
</div>

Answer 1

试试这个

$('.item_open').height(function(){
 return $(this).prev().height();
});

DEMO