.content {
	margin:0 auto;
	padding:0;
}
.content_area .alt {
	background:url(../images/top_l.jpg) no-repeat left top;
}
.content_area .art {
	background:url(../images/top_r.jpg) no-repeat right top;
}
.extra{
	
	background: #FFFFFF url(../images/main_curve.jpg) no-repeat left top;
	padding:1px 5px; 
	width:574px; 
	margin:10px auto;
}