body {
	background-color: rgb(127, 127, 127);
	 font-family: Helvetica, Arial, sans-serif;
}

.banner {
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.leftColumn{
	float:left;
	width:25%;
}

.rightColumn{
	float:right;
	width:15%;
}

.centerColumn{
	display: inline-block;
	width:60%;
}