ceneterd

login.php

<style>
	html,body {
		height: 100%;
		width: 100%;
		overflow: hidden;
	}

	.containerFull{
	 	height:100%;
	 	width: 100%;
	 	display:table;
	}

	.row-fluid {
		height: 100%;
		display:table-cell; 
		vertical-align: middle;
	}
</style>
</head>

<div class="containerFull">
    <div class="row-fluid">
        <div  style="text-align: center">
            Yeah I'm centered
        </div>
    </div>
</div>