Bonjour j'ai une page principale sur laquelle j'aimerai insérer un style. Je ne m'y connais pas du tout en css ni en tableau, on me demande d'intégrer 3 fichiers en fait( head.php, index.php et foot.php) qui sont déjà créés.
Voici le code de ma page principale sur laquelle je souhaite intégrer le style.

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<html>
<head>
<h1><div align="center"><font color="white">Console d'administration</div></h1>
<body background="img.jpg">

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>

<script type="text/javascript" src="ddaccordion.js"></script>

<script type="text/javascript">

ddaccordion.init({
	headerclass: "submenuheader", //Shared CSS class name of headers group
	contentclass: "submenu", //Shared CSS class name of contents group
	revealtype: "click", //Reveal content when user clicks or onmouseover the header? Valid value: "click", "clickgo", or "mouseover"
	mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover
	collapseprev: true, //Collapse previous content (so only one open at any time)? true/false 
	defaultexpanded: [], //index of content(s) open by default [index1, index2, etc] [] denotes no content
	onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed)
	animatedefault: false, //Should contents open by default be animated into view?
	persiststate: true, //persist state of opened contents within browser session?
	toggleclass: ["", ""], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]
	//togglehtml: ["suffix", "<img src='images/plus.gif' class='statusicon' />", "<img src='images/minus.gif' class='statusicon' />"], //Additional HTML added to the header when it's collapsed and expanded, respectively  ["position", "html1", "html2"] (see docs)
	animatespeed: "fast", //speed of animation: integer in milliseconds (ie: 200), or keywords "fast", "normal", or "slow"
	oninit:function(headers, expandedindices){ //custom code to run when headers have initalized
		//do nothing
	},
	onopenclose:function(header, index, state, isuseractivated){ //custom code to run whenever a header is opened or closed
		//do nothing
	}
})
</script>

<style type="text/css">

.glossymenu{
margin: 5px 0;
padding: 0;
width: 170px; /*width of menu*/
border: 1px solid #9A9A9A;
border-bottom-width: 0;
}

.glossymenu a.menuitem{
background: black url(glossyback.gif) repeat-x bottom left;
font: bold 14px "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, sans-serif;
color: white;
display: block;
position: relative; /*To help in the anchoring of the ".statusicon" icon image*/
width: auto;
padding: 4px 0;
padding-left: 10px;
text-decoration: none;
}


.glossymenu a.menuitem:visited, .glossymenu .menuitem:active{
color: white;
}

.glossymenu a.menuitem .statusicon{ /*CSS for icon image that gets dynamically added to headers*/
position: absolute;
top: 5px;
right: 5px;
border: none;
}

.glossymenu a.menuitem:hover{
background-image: url(glossyback2.gif);
}

.glossymenu div.submenu{ /*DIV that contains each sub menu*/
background: white;
}

.glossymenu div.submenu ul{ /*UL of each sub menu*/
list-style-type: none;
margin: 0;
padding: 0;
}

.glossymenu div.submenu ul li{
border-bottom: 1px solid blue;
}

.glossymenu div.submenu ul li a{
display: block;
font: normal 13px "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, sans-serif;
color: black;
text-decoration: none;
padding: 2px 0;
padding-left: 10px;
}

.glossymenu div.submenu ul li a:hover{
background: #DFDCCB;
colorz: white;
}
</style> 
</head>
<body>


<?php

include("connection.php"); 

echo'<strong><h3>Gestion des pages:</h3></strong></font><font color="#0066FF">';
$r_cat = mysql_db_query($db,"SELECT * FROM cat ORDER BY ordre ASC");
while($cat = mysql_fetch_assoc($r_cat))
    {
    
   $r_pages= mysql_db_query($db,"SELECT * FROM pages WHERE id_cat= '$cat[id]' ORDER BY ordre ASC");
   $n=mysql_num_rows($r_pages);
   if($n>=1)
  		{
   
   $class='menuitem submenuheader';
   $debut='<div class="submenu"><ul>';
   $fin='</ul></div>';
   	 	}
	else
			{
	$class='menuitem';
	$debut='';
	$fin='';
			}
	
    echo '<div class="glossymenu"><br /><form method="post" action="ajoutpages.php" ><input type="hidden" name="categories" value="'.$cat['id'].'" /><input type="image" src="plus.gif" title="Ajouter une page dans la catégorie" /></form><a class="'.$class.'">'.$cat['nom_fr'].'</a>'; 
	
    echo $debut;
    while($pages = mysql_fetch_assoc($r_pages))
				{
    echo '<li><br /><form method="post" action="modifpages.php" ><input type="hidden" name="pages" value="'.$pages['id'].'" /><input type="image" src="images.jpg" title="Modifier"/></form><em>'.$pages['titre_fr'].'/'.$pages['titre_en'].'</em></a></li>'; 
  				}
    echo $fin.'</div>';
	
	}	?>
    <strong><h3><a href="admincat.php">Gestion des catégories</a></h3></strong>
</div>
</body>
</html>
<?php mysql_close();?>

Je ne sais pas ou placer les 3 autres fichiers, si il faut faire des include ou pas. Si vous savez, merci.