Centralizando elemento em um elemento.

by Yure Pereira

HTML

<div style="display: table; height: 400px; overflow: hidden;">
         <div style="display: table-cell; vertical-align: middle;">
           <div>
             everything is vertically centered in modern IE8+ and others.
           </div>
         </div>
       </div>

CSS

div { border:1px solid green;}