正则表达式匹配时间

 你可以将这三个小冰柱分成如下： 
 
<div id="background">

    <!-- Each Icicle --->
    <div class="icicle" id="ice1">
        <!-- Pieces that make up each icicle -->
        <span></span>
        <span></span>
        <span></span>
    </div>

</div>
 
 并使用id来定位每个冰柱 
 
 http://jsfiddle.net/samliew/KJKLV/ 

You could group those three small pieces of icicles into one like these:
 
<div id="background">

    <!-- Each Icicle --->
    <div class="icicle" id="ice1">
        <!-- Pieces that make up each icicle -->
        <span></span>
        <span></span>
        <span></span>
    </div>

</div>
 
and position each icicle using the id's
 
http://jsfiddle.net/samliew/KJKLV/