#main_wrap {
	width: 666px;
	margin-left: auto;
	margin-right: auto;
}
#header {
	height: 120px;
}
#left_nav {
	float: left;
	width: 155px;
	height: 400px;
}
body>#left_nav {
	min-height: 400px;
}
#main_content {
	float: right;
	width: 505px;
}
#clear_floats {
	clear: both;
}
#footer {
	height: 30px;
}