Full Height Divs!

Had a lot of trouble with such a simple concept. Turns out that the most logical answer is correct and again I'm slave to Occam's razor :P

by gorillawit

HTML

<div class="parent">hello</div>

CSS

body,html{height:100%;}

.parent{
    min-height:100%;
    width:400px;
    margin:0 auto;
    background:red;
}