#site_layout {
	background-color: #223762;
	padding: 35px;
	height: 100%;
	width: 100%;
}
#content_center {
	background-image: url(../images/b_wel.jpg);
	height: 162px;
	width: 258px;
}
#content_center1 {
	background-image: url(../images/index_16.jpg);
	height: 265px;
	width: 219px;
}
#content_center2 {
	background-image: url(../images/b_nw.jpg);
	height: 427px;
	width: 163px;
}