.container {
	background-color: #C60;
	width: 970px;
	margin-right: auto;
	margin-left: auto;
	position: relative;
	height: 1000px;
}
.maincon {
	background-color: #969;
	height: 800px;
	width: 970px;
	top:150px;
}
.box100 {
	background-color: #96F;
	height: 300px;
	width: 300px;
	margin: 4px;
	padding: 4px;
}