#divExCont{
position:absolute; 
left:-1; top:-1; 
clip:rect(0,0,0,0); 
layer-background-color:aqua; 
background-color:white; 
padding:8
}
#divCircle
{position:absolute; 
z-index:500; 
visibility:hidden; 
width:300
}
BODY
{
background-color:black;
font-family:verdana;
font-size:30px;
}
a.bouton
{
color: red;
font-family: comic sans ms;
font-size: 20px;
font-weight: bold;
text-decoration: underline;
text-align: center;
padding: 5px;
position: relative;
}
a:hover.bouton
{
color: black;
background: silver;
border: 2px ouset silver;
text-decoration: none;
}