#header {
    background-color:#3BB355;
    background-image:url('../imgs/ban_informatique.png');
 }
 
#menu {
    background-color:#3BB355;
}

#menu a:hover {
    background-color:#7BD38E;
}

#imgfond{ 
    background-image: url('../imgs/informatique.jpg'); 
    background-repeat: no-repeat;  
}

#footer {
    background-color:#3BB355;
}