@import url(alt-4-gauche.css) screen;
#entete {
    background-image: url(img/logo-AI.jpg);
    overflow: visible
    }
#entete a.nom-site:visited {
    background-image: none
    }
#entete .nom-site span {
    display: block;
    width: 0;
    height: 0;
    overflow: hidden
    }