body {behavior: url(csshover.htc);}
div#menu_galerie {width: 415px; top:300px; }
div#menu_galerie ul {padding: 0;  border:0px solid; margin:0px; vertical-align:middle;}
div#menu_galerie li.sousmenu {background: yellow;}
div#menu_galerie ul li {position:relative; list-style: none; border-bottom:0px solid;}
div#menu_galerie ul ul {position: absolute; top: 0; left: 370px; display:none}
div#menu_galerie ul ul ul {position: absolute; top: 0; left: 200px; display:none}
div#menu_galerie li a {text-decoration: none;}
div#menu_galerie ul.niveau1 li.sousmenu:hover ul.niveau2 {display:block; width:200px;}
div#menu_galerie ul.niveau2 li.sousmenu:hover ul.niveau3 {display:block; width:200px;}