left #nav / centered #content

HTML

<div id="nav">
</div>


<div id="content">
    Hello
</div>

CSS

#nav{
	position: absolute;
	top: 100px;
	display: inline-block;
	width: 200px;
	height: 400px;
  border: solid;
	border-width: 1px;
}

#content{
	position: absolute;
	display: inline-block;
	top: 100px;
	left: 0;
	right: 0;
	margin: auto;
	width: 500px;
	height: 400px;
	border: solid;
	border-width: 1px;
	
}