Problemas com o IE com o Menu Horizontal SubMenu Vertical

Ola, gostaria de saber qual o codigo em javascript que habilite esse menu funcionar no IE

Meu codigo do css esta assim:

/Menu/ #topo #menu { margin: 0; padding: 0;}#topo #menu a { display: block; }#topo #menu li { list-style: none; float: left; height: 1%; }#topo #menu li ul { position: absolute; visibility: hidden;}#topo #menu li ul li { float: none; white-space: nowrap; display: inline; / o inline é pro IE /}#topo #menu li ul li ul { position: absolute; left: 100%; top: 0; }#topo #menu li:hover ul, #topo #menu li.over ul { visibility: visible;}#topo #menu li:hover ul ul, #topo #menu li.over ul ul { visibility: hidden;}#topo #menu ul ul li:hover ul, #topo #menu ul ul li.over ul { visibility: visible;} / visual */#topo #menu { padding-left:10px; text-transform:uppercase; background-color:#009900; color:#FFF; height:33px; _height:25px; tex-align:center; border-top:solid; border-bottom:solid; border-color:#FFF; }#topo #menu a { ext-decoration: none; font:bold 80% 'Trebuchet Ms', Helvetica,Arial,Tahoma,Verdana,Sans-Serif; color:#FFF; border-right:0.2px solid #6F9500; border-left:1px solid #FFF; padding:5px; _padding:-1px 10px 10px; text-transform:uppercase; tex-align:center;; }#topo #menu a:hover { background:#FFF; color:#CCCCCC; }#topo #menu ul li ul { background-color: #009900; border: 1px solid #000; }E a parte do html esta estruturado com ul e li!

Obrigado