.izq {
	top: 0;
	left: 0;
	position: absolute;
	height: 100%;
	width: 50%;
	float: left;
	background-color: black;
}

.der {
	top: 0;
	left: 50%;
	position: absolute;
	height: 100%;
	width: 50%;
	float: right;
	background-color: white;
}