.main_menu ul {
    margin: 0 0 0 15px;
    list-style:none;
    background: #353D40;
    }
   .main_menu ul li {
    line-height: 15px;
    height:59px;
    float:left;
    /*background: url(/img/main_menu_separator.gif) right 18px no-repeat;*/
    position:relative; 
    }
   .main_menu ul li a {
    color: #fff;
    display:block;
    text-align:center;
    }
    .main_menu ul li a:hover {
    text-decoration:none;
    }
    .main_menu ul li a.img_nav {
    position:absolute;
    z-index:1;
    top:0;
    left:0;
    height:59px;
}
    .main_menu ul li a.img_nav:hover, .main_menu ul li.main_menu_1_active a.img_nav, .main_menu ul li.main_menu_2_active a.img_nav, .main_menu ul li.main_menu_3_active a.img_nav, .main_menu ul li.main_menu_4_active a.img_nav {
    background-position:0 -59px;
    height:67px;
}
    .main_menu ul li a.text_nav:hover, .main_menu ul li.main_menu_1_active a.text_nav, .main_menu ul li.main_menu_2_active a.text_nav, .main_menu ul li.main_menu_3_active a.text_nav, .main_menu ul li.main_menu_4_active a.text_nav {
    background:none;
    color:#000;
}
    .main_menu ul li.main_menu_4 {
    background-image:none;
}
    .main_menu ul li a.text_nav {
    position:absolute;
    z-index:0;
    top:0;
    left:0;
    height:39px;
    background:#343C3F;
    padding-top:20px;
    }
    .main_menu ul li:hover a.text_nav {
    color:#fff;
    text-decoration:none;
    }
    .main_menu ul li.main_menu_1_active:hover a.text_nav, .main_menu ul li.main_menu_2_active:hover a.text_nav, .main_menu ul li.main_menu_3_active:hover a.text_nav, .main_menu ul li.main_menu_4_active:hover a.text_nav  {
    color:#000;
    text-decoration:none;
    }