Problème de découpage de page html

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 
<%@ taglib prefix="s" uri="/struts-tags" %>
 
 
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
 
<style type="text/css">
*{
	/* A universal CSS reset */
	margin:0;
	padding:0;
}
 
 
#navigationMenu li{
	list-style:none;
	height:39px;
	padding:2px;
	width:40px;
}
 
#navigationMenu span{
	/* Container properties */
	width:0;
	left:38px;
	padding:0;
	position:absolute;
	overflow:hidden;
 
	/* Text properties */
	font-family:'Myriad Pro',Arial, Helvetica, sans-serif;
	font-size:18px;
	font-weight:bold;
	letter-spacing:0.6px;
	white-space:nowrap;
	line-height:39px;
 
	/* CSS3 Transition: */
	-webkit-transition: 0.25s;
 
	/* Future proofing (these do not work yet): */
	-moz-transition: 0.25s;
	transition: 0.25s;
}
 
#navigationMenu a{
	background:url('/ProjetVrai/images2/navigation.jpg') no-repeat;
 
	height:39px;
	width:38px;
	display:block;
	position:relative;
}
 
/* General hover styles */
 
#navigationMenu a:hover span{ width:auto; padding:0 20px;overflow:visible; }
#navigationMenu a:hover{
	text-decoration:none;
 
	/* CSS outer glow with the box-shadow property */
	-moz-box-shadow:0 0 5px #9ddff5;
	-webkit-box-shadow:0 0 5px #9ddff5;
	box-shadow:0 0 5px #9ddff5;
}
 
/* Green Button */
 
#navigationMenu .home {	background-position:0 0;}
#navigationMenu .home:hover {	background-position:0 -39px;}
#navigationMenu .home span{
	background-color:#7da315;
	color:#3d4f0c;
	text-shadow:1px 1px 0 #99bf31;
}
 
/* Blue Button */
 
#navigationMenu .about { background-position:-38px 0;}
#navigationMenu .about:hover { background-position:-38px -39px;}
#navigationMenu .about span{
	background-color:#1e8bb4;
	color:#223a44;
	text-shadow:1px 1px 0 #44a8d0;
}
 
/* Orange Button */
 
#navigationMenu .services { background-position:-76px 0;}
#navigationMenu .services:hover { background-position:-76px -39px;}
#navigationMenu .services span{
	background-color:#c86c1f;
	color:#5a3517;
	text-shadow:1px 1px 0 #d28344;
}
 
/* Yellow Button */
 
#navigationMenu .portfolio { background-position:-114px 0;}
#navigationMenu .portfolio:hover{ background-position:-114px -39px;}
#navigationMenu .portfolio span{
	background-color:#d0a525;
	color:#604e18;
	text-shadow:1px 1px 0 #d8b54b;
}
 
/* Purple Button */
 
#navigationMenu .contact { background-position:-152px 0;}
#navigationMenu .contact:hover { background-position:-152px -39px;}
#navigationMenu .contact span{
	background-color:#af1e83;
	color:#460f35;
	text-shadow:1px 1px 0 #d244a6;
}
 
/* The styles below are only needed for the demo page */
 
#main{
	margin:80px auto;
	position:relative;
	width:40px;
}
 
 
h1{
	color:#fff;
	font-size:30px;
	font-weight:normal;
	padding:60px 0 20px;
	text-align:center;
}
 
a, a:visited,a:active {
	color:#0196e3;
	text-decoration:none;
	outline:none;
}
 
a:hover{
	text-decoration:underline;
}
 
a img{
	border:none;
}
 
</style>
 
 
 
</head>
 
 
<body>
 
<s:form id="statsForm" action="refreshChart" method="POST" theme="simple">
 
<div id="chartContainer"></div>   
 
<s:hidden id="graphXML" name="graphXML" />
<s:hidden id="chartType" name="chartType" />
 
 
 
 
 
 
 
 
<ul id="navigationMenu">
    <li>
	    <a class="home" href="<s:url action="Bar"/>">
            <span>Bar</span>
        </a>
    </li>
 
    <li>
    	<a class="about" href="<s:url action="Column2D"/>">
            <span>Column2D</span>
        </a>
    </li>
 
    <li>
	     <a class="Line2D" href="<s:url action="Line2D"/>">
            <span>Line2D</span>
         </a>
    </li>
 
    <li>
    	<a class="portfolio" href="<s:url action="Pie2D"/>">
            <span>Pie2D</span>
        </a>
    </li>
 
    <li>
    	<a class="contact" href="<s:url action="Pie3D"/>">
            <span>Pie3D</span>
        </a>
    </li>
</ul>
 
 
 
</s:form>
 
</body>
</html>

<div id="chartContainer"></div>   
 
<s:hidden id="graphXML" name="graphXML" />
<s:hidden id="chartType" name="chartType" />

<ul id="navigationMenu">
    <li>
	    <a class="home" href="<s:url action="Bar"/>">
            <span>Bar</span>
        </a>
    </li>
 
    <li>
    	<a class="about" href="<s:url action="Column2D"/>">
            <span>Column2D</span>
        </a>
    </li>
 
    <li>
	     <a class="Line2D" href="<s:url action="Line2D"/>">
            <span>Line2D</span>
         </a>
    </li>
 
    <li>
    	<a class="portfolio" href="<s:url action="Pie2D"/>">
            <span>Pie2D</span>
        </a>
    </li>
 
    <li>
    	<a class="contact" href="<s:url action="Pie3D"/>">
            <span>Pie3D</span>
        </a>
    </li>
</ul>