Is it what you are looking for? LINK
HTML:
<td class="hover">hh
<ul>
<li>0</li>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
</td>
CSS:
td.hover {
text-align: left;
list-style: none;
}
td.hover ul {
padding: 0;
position: absolute;
top: 28px;
width: 150px;
opacity: 0;
visibility: hidden;
}
td.hover ul li {
background: #555;
display: block;
color: #fff;
text-shadow: 0 -1px 0 #000;
}
td.hover ul li:hover {
background: #666;
}
td.hover:hover ul {
display: block;
opacity: 1;
visibility: visible;
}