function afficher_swf(elt){
    var largeur = elt.getElementsByTagName("img")[0].width;
    var hauteur = elt.getElementsByTagName ("img")[0].height;
    var flash = "<object type='application/x-shockwave-flash'";
    flash += "data='"+elt.href+"' width='"+largeur+"' height='"+hauteur+"'>";
    flash += "<param name='movie' value='"+elt.href+"' />";
    flash += "<img src='noflash.gif' width='"+largeur+"' height='"+hauteur+"' alt='flash non installé' />";
    flash += "</object>";
    elt.innerHTML = flash;
    return false;
}