body
{
   width: 
   margin: auto;
   margin-top: 20px;
   margin-bottom: 20px;    
   background: black;
   text-align: center;
   background-image: url("images/fond.png");
}
h1
{
font-size: 34px;
text-align: center;
color: red;
}
h2
{
font-size: 20px;
text-align: center;
color: red;
}
ul
{
padding:0;
margin:0;
list-style-type:none;
}
li
{
margin-top: 10px;
margin-left:250px;
float:left; /*pour IE*/
}
ul li a
{
display:block;
float:left;   
width: 100px;
background-color:#ff0000;
color:#000000;
text-decoration:none;
text-align:center;
padding:5px;
border-width:2px;
border-style:solid;
/*pour avoir un effet "outset" avec IE :*/
border-color:#DCDCDC #696969 #696969 #DCDCDC;
}
ul li a:hover
{
background-color:#ffff00;
border-color: #696969 #DCDCDC #DCDCDC #696969;
} 
span
{
margin-top:540px;
float:left;
}