html, body {margin: 0; padding: 0; height:100%;}

div#page {
	position: relative;
	max-width: 1000px;
	min-width: 1000px;
	width:80%;
	padding: 0 0px;
	margin: 0 auto;
}

div#bandeau_sup {
	height: 152px;
}

div#col_centrale {
	padding: 1px 0;
	padding-left:20px;
	padding-right:20px;
	padding-bottom:235px;
	margin: 0;
	margin-left:28%;
	margin-right:28%;
}

div#col_gauche {
	float: left;
	width:28%;
}
div#col_droite {
	float: right;
	width:28%;
}

div#bandeau_inf {
	position: absolute;
	bottom: 6%;left:0;
	width: 100%;
	height: 92px;
	clear:both;
	z-index:0;
} 

div#plan_site_ment_leg {
	position: absolute;
	bottom: 0; left: 0;
	width: 50%;
	height: 6%; text-align: left;
}

div#cmmi {
	position: absolute;
	bottom: 0; right: 0;
	width: 50%;
	height: 6%; text-align: right;
}

#plan_site_ment_leg li {
	display:inline;
	list-style-type:none;
	font-size:10px;
}

<!--[if lt IE 7]>
body {
 text-align: center;
}
div#page {
width:expression(document.body.clientWidth > 1000  ? "1000px" : "1000px" );
}
<![endif]-->