.flip-box.flip-box{
    -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=99)";
    filter: alpha(opacity=99);
    opacity:0.99;
}
#main-categories{
    position:absolute;
    width:100%;
}
#main-categories ul{
    width:960px;
    margin:0 auto;
}
.menu_container li{width:85%;}