Toujours aucune réponse et je ne viens pas à bout de mon problème
je vous met le css de la page 
 #global {
position:absolute;
left: 50%;
top: 50%;
width: 1014px;
height: 620px;
margin-top: -310px; /* moitié de la hauteur */
margin-left: -507px; /* moitié de la largeur */
border: 1px solid #000066;
background-color: #000066;
}
html {
	height:100%;
	max-height:100%;
	padding:0;
	margin:0;
	border:0;
	font-size:90%;
	font-family:"trebuchet ms", "trebuchet", "verdana", sans-serif;
	overflow: hidden;
	font-weight: bold;
/* */ 
}
body {
	height:100%;
	max-height:100%;
	overflow:hidden;
	padding:0;
	margin:0;
	border:0;
	background-color: #000066;
	left: 0px;
	top: 0px;
}
#head {
	height: 150px;
	position: absolute;
	z-index: 6;
	visibility: visible;
	width: 100%;
	left: 0px;
	top: 0px;
	background-image: url(images/interfacesitefin_01.jpg);
	background-repeat: no-repeat;
	margin-top: 0px;
}
#content {
	overflow:auto;
	position:absolute;
	z-index:3;
	top:150px;
	bottom:47px;
	left:150px;
	right:0;
	background:url(images/interfacesitefin_03.jpg) no-repeat;
	visibility: visible;
}
* html #content {
	height:100%;
	width:100%;
	top:0;
	left:0;
	border-top:150px solid #1d4b8f;
	border-bottom:45px solid #1d4b8f;
	border-left:150px solid #1d4b8f;
	background-attachment: fixed;
}
#content p {padding:10px 10px 10px 15px;}
.bold {
	font-size:1.2em;
	font-weight:bold;
	color: #003366;
	text-align: center;
}
pre {color:#c00; margin-left:10px; font-family:"trebuchet ms", "trebuchet", "verdana", sans-serif;}
h2 {
	margin-left:10px;
	color: #003366;
}
h3 {margin-left:10px;}
#gauche {
	background-color: #CCCCCC;
	height: 450px;
	width: 150px;
	position: absolute;
	left: 0px;
	z-index: 4;
	visibility: visible;
	background-image: url(images/interfacesitefin_02.jpg);
	top: 150px;
}
.logo {
	height: 80px;
	width: 300px;
	margin-top: 8px;
	text-align: left;
	margin-left: 5px;
	margin-bottom: 0px;
}
#foot {
	DISPLAY: block;
	FONT-SIZE: 9px;
	Z-INDEX: 5;
	BACKGROUND: #000066;
	LEFT: 0px;
	MARGIN: 0px;
	OVERFLOW: hidden;
	WIDTH: 100%;
	COLOR: #fff;
	BOTTOM: 0px;
	POSITION: absolute;
	HEIGHT: 50px;
	text-align: center;
	border-top-width: medium;
	border-right-width: medium;
	border-bottom-width: medium;
	border-left-width: medium;
	border-top-style: outset;
	border-top-color: #CEE8F4;
	border-right-color: #CEE8F4;
	border-bottom-color: #CEE8F4;
	border-left-color: #CEE8F4;
	visibility: visible;
	font-family: "Comic Sans MS", "Palatino Linotype", "Calisto MT", "Bookman Old Style";
	text-decoration: none;
	top: 569px;
}
.menuhaut {
	float: right;
	width: 450px;
	margin: 5px;
}
.menuhaut a {font-weight: bold;color: #000066;
text-decoration: none; margin-left: 20px; }
dl, dt, dd, ul, li {
	margin: 0;
	padding: 0;
	list-style-type: none;
	font-weight: bold;
	height: auto;
}
#menu {
	top: 0;
	left: 0;
	color: #000066;
	font-weight: bold;
	font-family: "Comic Sans MS", "Palatino Linotype", "Calisto MT", "Bookman Old Style";
}
#menu {
width: 150px;
}
#menu dt {
	cursor: pointer;
	margin: 2px 0;
	color: #000033;
	height: 30px;
	line-height: 30px;
	text-align: center;
	font-weight: bold;
	border: medium outset #99CCFF;
	background-color: #99CCFF;
	filter:alpha(opacity=50);
-moz-opacity:0.5;
	opacity:0.5;
}
#menu dd {
	display: none;
	border: medium outset #99CCFF;
	filter:alpha(opacity=50);
-moz-opacity:0.5;
	opacity:0.5;
	margin: 0px;
	line-height: 1px;
}
#menu li {
	text-align: center;
	color: #003366;
	text-decoration: none;
	font-size: 90%;
	font-family: Verdana, Arial, Helvetica, sans-serif;
}
#menu  dt a {
	color: #000066;
	text-decoration: none;
	display: block;
	border: 0 none;
	height: auto;
	font-weight: bolder;
	top: 0px;
}
#menu li a,  {
	color: #000066;
	text-decoration: none;
	display: block;
	border: 0 none;
	font-weight: bolder;
	top: 0px;
	line-height: normal;
}
#menu li a:hover, #menu dt a:hover, .menuhaut a:hover, .presentationG a:hover{
	background: #99CCFF;
	text-decoration: none;
	color: #000099;
}
 .Style1 {
	font-size: 100%;
	color: #003366;
	font-weight: bold;
}
 
.pave {
	font-weight: bolder;
	color: #000033;
	background-color: #FFFFFF;
	filter:alpha(opacity=30);
-moz-opacity:0.3;
	opacity:0.3;
	font-size: 90%;
	float: right;
	display: Aucune;
	margin-top: 45px;
	margin-left: 1px;
	text-align: center;
	border: 1px solid #CCCCFF;
	padding: 5px;
	margin-right: 2px;
}
.head2 {
	float: right;
	height: 15px;
	width: 580px;
	margin-right: 20px;
	margin-top: 80px;
}
.presentationG {
	float: left;
	margin-left: 10px;
	margin-top: 0px;
}
.lettrine
{
	float: left;
	width: 0.8em;
	font-size: 3em;
	font-family: Georgia, "Times New Roman", Times, serif;
	color: #003366;
	font-weight: bold;
	line-height: 85%;
}
.presentationd {
	float: right;
	margin-left: 10px;
	margin-top: 0px;
}
.presentationcentre {
	float: Aucune;
	margin-top: 8px;
	color: #003366;
	margin-left: 50px;
	width: 600px;
}
.cadre {
	width: 350px;
	background: url(images/images/cadre2_01.gif) no-repeat left top;
	top: 0px;
	padding-left: 0px;
	padding-top: 0px;
	margin-left: 20px;
	float: left;
}
.bloccadre {
	background: url(images/images/cadre2_02.gif) no-repeat left bottom;
	padding-bottom: 30px;
	float: left;
	width: 350px;
}
.bloccadre p {
margin: 0 0px 0 15px;
}
Le premier problème c'est sur menuhaut et l'autre surement dans content