* {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
}
#container {
	width: 900px;
	border: 1px #eee solid;
	height: 600px; 
	margin: 10px auto;
	padding: 20px;	
}
#main_block {
	height: 310px;
}
#menu_wrap {
	width: 420px;
	margin: 0 auto;	
}
#menu {
	list-style-type: none;
	display: inline;
	height: 30px;
	width: 400px;
}
#menu li {
	float: left;
}
.clear {
	clear: both;
}