#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;
}
 
.moduletablemainnav { /* I have absolutely positioned the module, you might have a different scheme*/
  position:absolute;
  top:187px;
  left:20px;
  z-index:100;
  font:0.9em Verdana, Arial, Helvetica, sans-serif;
  margin:0;
  padding:0;
}
 
#mainlevelmainnav,#mainlevelmainnav ul {
  float:right;
  list-style:none;
  line-height:1em;
  background:transparent;
  font-weight:700;
  margin:0;
  padding:0;
}
 
#mainlevelmainnav a {
  display:block;
  color:#1d62cd;
  height:28px;
  line-height:28px;
  font-size:17px;
  text-align:left;
  margin-right:5px;
  text-decoration:none;
  padding:0.3em;
}

#mainlevelmainnav li a.mainlevelmainnav:hover {
 background-color:#c7d4e9
}
 
#mainlevelmainnav li {
  float:left;
  padding:0;
}
 
#mainlevelmainnav li ul  {
  position:absolute;
  left:-999em;
  height:auto;
  width:11em;
  background:#005a9d;
  margin:0;
  filter:alpha(opacity=60);
  -moz-opacity:0.6;
  -khtml-opacity: 0.6;
  opacity: 0.6;
}
 
#mainlevelmainnav li li {
  width:11em;
}
 
#mainlevelmainnav li ul a {
  color:#ffffff;
  text-align:left;
  display:block;
  padding-left:8px;
  font-size:12px;
  line-height:28px;
  font-weight:400;
}
 
#mainlevelmainnav li:hover ul ul,#mainlevelmainnav li:hover ul ul ul,#mainlevelmainnav li.sfhover ul ul,#mainlevelmainnav li.sfhover ul ul ul{
  left:-999em;
}
 
#mainlevelmainnav li:hover ul,#mainlevelmainnav li li:hover ul,#mainlevelmainnav li li li:hover ul,#mainlevelmainnav li.sfhover
  ul,#mainlevelmainnav li li.sfhover ul,#mainlevelmainnav li li li.sfhover ul {
  left:auto;
  z-index:6000;
}
 
#mainlevelmainnav li li:hover,#mainlevelmainnav li li.sfhover {
 background-color:#002d4f;
}