.ie8 header nav#main-navigation ul > li ul, .ie7 header nav#main-navigation ul > li ul {
  visibility: visible;
  display: none;
}
.ie8 header nav#main-navigation ul > li ul li , .ie7 header nav#main-navigation ul > li ul li {
  height: auto;
}

.ie7 header nav#main-navigation, .ie8 header nav#main-navigation, .ie9 header nav#main-navigation {
  width: 820px;
  margin-left: 160px;
}