I'm trying to align two images vertically using CSS' display: table-cell property, but it doesn't seem to be working even after specifying the height.
<div style='display: table;height:500px'>
<div style=' display: table-cell;vertical-align: middle;'>
<img src='http://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Intel-logo.svg/200px-Intel-logo.svg.png' />
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Intel-logo.svg/500px-Intel-logo.svg.png" />
</div>
</div>