#twocols{ /*the columns that gets dropped down over yours might be different*/
z-index:20;
}
#leftcol{  /*the columns that gets dropped down over yours might be different*/
z-index:10;
}
.moduletableexmenu{ /* I have absolutely positioned the module, you might have a different scheme*/
z-index:100;
margin:0;
padding:0;
}
#mainlevelexmenu,#mainlevelexmenu ul{
float:left;
list-style:none;
line-height:1em;
margin:0;
padding:0;
margin-left:-5px
}
#mainlevelexmenu a{
display:block;
text-decoration:none;
margin-right:15px;
padding:0.3em;
font-size:15px;
}
#mainlevelexmenu li{
float:left;
padding:0;
}
#mainlevelexmenu li ul{
position:absolute;
left:-999em;
height:auto;
width:180px;
background:#eee;
border:#ccc 1px solid;
margin:0;
}
#mainlevelexmenu li li{
width:180px;
}
#mainlevelexmenu li ul a{
width:180px;
line-height:1em;
font-size:12px;
}
#mainlevelexmenu li:hover ul ul,#mainlevelexmenu li:hover ul ul ul,#mainlevelexmenu li.sfhover ul ul,#mainlevelexmenu li.sfhover ul ul ul{
left:-999em;
margin-top: -15px;
margin-left:100px;
}
#mainlevelexmenu li:hover ul,#mainlevelexmenu li li:hover ul,#mainlevelexmenu li li li:hover ul,#mainlevelexmenu li.sfhover ul,#mainlevelexmenu li li.sfhover ul,#mainlevelexmenu li li li.sfhover ul{
left:auto;
z-index:6000;

}
#mainlevelexmenu li li:hover,#mainlevelexmenu li li.sfhover{
background:#eee;
}