[Blood]

<div id="container">
	<div id="header">header</div> 
	<div id="menu">menu right</div>
	<div id="menu_left">menu left</div>
	<div id="contents">content</div>
	<div id="footer">footer</div>
</div>

body {
	margin: auto;
	margin-top: 15px;
	padding: 0;
	color: black;
	font-size: 12px;
}
#container {
	width: 100%;
}
#header {
	position: relative;
	width: 100%;
	border: 1px solid blue;
}
#menu {
	float: right;
	width: 20%;
}
#contents { 
	float: left;
	width: 59.5%;
	border: 1px solid gray;
}
#menu_left {
	width: 20%;
	float: left;
}
#footer {
	clear: both;
	width: 100%;
	border: 1px solid red;
}

Prosto ?