html {
	display: table;
	width: 100%;
	height: 100%;
}

body {
	display: table-cell;
	width: 100%;
	height: 100%;
	vertical-align: middle;
}

div.leftNav {
    float:left;
    width:180px;
} 


div.rightNav {
    float:right;
    width:180px;
}