.menu {
font-family: verdana, arial, tahoma;
font-size:13px;
font-weight: bold;
height:320px;
MozOpacity:0.7;
opacity:0.7;
filter:alpha(opacity=70);
}

/* remove all the bullets, borders and padding from the default list styling */
.menu ul {
padding:0;
margin:0;
list-style-type:none;
width:150px;
height:320px;
position:relative;
background:transparent url(../images/opaque.png);
}

.menu li {
height:25px;
}
* html .menu li {margin-left:-16px; margin-lef\t:0;}
/* get rid of the table */
.menu table {position:absolute; border-collapse:collapse; top:0; left:0; z-index:100; font-size:1em; width:0; height:0;}

/* style the links */
.menu a, .menu a:visited {
display:block;
text-decoration:none;
height:25px;
line-height:25px;
width:150px;
color:#000;
text-indent:5px;
border-bottom:1px solid #fff;
}
/* style the link hover */
* html .menu a:hover {color:#fff; background:#999;}

.menu :hover > a {
color:#fff;
background:#999;
}

/* hide the sub levels and give them a positon absolute so that they take up no room */
.menu ul ul {
visibility:hidden;
position:absolute;
top:0px;
left:150px;
}
/* make the second level visible when hover on first level list OR link */
.menu ul li:hover ul,
.menu ul a:hover ul {
visibility:visible;
height:320px;
}
/* keep the third level hidden when you hover on first level list OR link */
.menu ul :hover ul ul{
visibility:hidden;
}
/* keep the fourth level hidden when you hover on second level list OR link */
.menu ul :hover ul :hover ul ul{
visibility:hidden;
}
/* make the third level visible when you hover over second level list OR link */
.menu ul :hover ul :hover ul{
visibility:visible;
height:320px;
}
/* make the fourth level visible when you hover over third level list OR link */
.menu ul :hover ul :hover ul :hover ul {
visibility:visible;
height:320px;
}