[babababa_13]

OK voici le code

xhtml,body {background: #000000;  margin: 0%}
h1 {
font-size: 32pt;
font-family: comic sans ms; 
color: blue; 
text-align: center}

h2 {
font-size: 25pt;
font-family: comic sans ms; 
color: green; 
text-align: center}

h3 {
font-size: 25pt;
font-family: comic sans ms; 
color: green;
background: #999999; 
text-align: center}


p {
font-size: 12pt;
font-family: comic sans ms; 
color: #66FF66; 
text-align: left}

ul, ol {
font-size: 12pt;
font-family: comic sans ms;
color: #66FF66; 
text-align: left}

a {text-align: center}

a.dessous span {
display: none;
}

a:hover.dessous span {
display: block; 
position: ********; 

margin-left: 280px; 

width: 710px; 
padding: 2px; 
margin: 0px; 
z-index: 100; 
color: #008000; 
background: black;
font: 12px comic sans ms, sans-serif; 
font-weight:bold;
text-align: center;
}


a.span span {
display: none;
}

a:hover.span span {
display: block; 
position: ********; 

margin-left: 280px; 

width: 710px; 
padding: 2px; 
margin: 0px; 
z-index: 100; 
color: #008000; 
background: black;
font: 12px comic sans ms, sans-serif; 
font-weight:bold;
text-align: center;
}


.center {text-align: center;}

.right {text-align: right;}

#menuDeroulant
{width: 700px;
 list-style-type: none;
 margin: 0;
 padding: 0;
 border: 0;}
 
#menuDeroulant li
{float: left;
width: 300px;
 margin: 0;
 padding: 0;
 border: 0;}
 
 #menuDeroulant .sousMenu
{display: none;
list-style-type: none;
 margin: 0;
 padding: 0;
 border: 0;}
 
#menuDeroulant .sousMenu li
{float: left;
 margin: 0;
 padding: 0;
 border: 0;
 width: 299px;
 border-top: 1px solid transparent;
 border-right: 1px solid transparent;}
 
#menuDeroulant li a:link, #menuDeroulant li a:visited
{display: block;
 height: auto;
 color: #FFFFFF;
 background: #0099CC;
 margin: 0;
 padding: 4px 8px;
 border-right: 1px solid transparent;
 text-decoration: none;}
 
#menuDeroulant li a:hover { background-color: #66CCFF; }
#menuDeroulant li a:active { background-color: #5F879D; }

#menuDeroulant .sousMenu li a:link
#menuDeroulant .sousMenu li a:visited
{display: block;
 color: #FFF;
 margin: 0;
 border: 0;
 text-decoration: none;
 background: transparent;}
 
#menuDeroulant .sousMenu li a:hover
{background-image: none;
 background-color: #33FF00;}
 
 #menuDeroulant li:hover > .sousMenu { display: block; }

Si c'est un peu le bordel, c'est normal. Les feuilles de style j'ai essayé de comprendre hier soir donc c'est un peu récent pour moi ^^