Question

I want to vertically center <div id="innner"> inside <div id="outer">, when the contents of <div id="innner"> are dynamically generated, and thus variable in height. That is,

<div id="outer">
    <div id="inner">
        // dynamically generated stuff
    </div>
</div>

Answer 1

#outer{
    float:left; 
    height:50%; 
    margin-bottom:-120px;
}

#inner{
    clear:both; 
    height:240px; 
    position:relative;
}

HTML

<div id="outer">
<div id="inner">
Content here
</div>
</div>