#header {
	position:absolute;
	left:50%;
}
#bg {
	width:720px;
	height:165px;
	position:absolute;
	top:0px;
	tleft:0px;
	margin-left:-360px;
	z-index:0;
}
#nav {
	width:493px;
	height:24px;
	position:absolute;
	margin-left:-145px;
	top:141px;
	tleft:0px;
	z-index:1;
}
#clear {
	width:720px;
	height:165px;
}