css and mootools navigation

Hello,
I have a problem with my css and navigation of my site
I can not place the menu at the bottom of the header
can you help me?
my navigation
thank you

HTML-Code:

---

.mod_customnav2 .mod_customnav2 block li{
        line-height:26px;
  margin-top: 0px;
  margin-right: 15px;
  margin-bottom: 0px;
  margin-left: 15px;
}
.mod_customnav2 li{
line-height:26px;
  float:left;
  list-style:none;
}
*html .mod_customnav2 ul{height:1px;}
.mod_customnav2,.mod_customnav2 *{
  margin:0;
  padding:0;
  list-style: none;
}

.nosubmenu .active {
    background-color: rgba(255, 255, 255, 0.5);
  color:#000
}

.submenu .active {
  background-color: rgba(0, 0, 0, 0.8);
  color:#fff;
}

.mod_customnav2 li a,.mod_customnav2 li p{
        text-align:center;
        line-height:26px;
        width:110px;
        display:block;
        color:#000;
        padding-top: 0;
        padding-right: 13px;
        padding-bottom: 0;
        padding-left: 13px;
        margin-top: 1px;
        margin-bottom: 1px;
}
.mod_customnav2 li a:hover{
  text-decoration:none;
  background-color: rgba(255, 255, 255, 0.5);
  color:#000;
}

.mod_customnav2 .submenu a li{
        line-height:26px;
        display:block;
        color:#fff;
        padding-top: 0;
        padding-right: 13px;
        padding-bottom: 0;
        padding-left: 13px;
        margin-top: 1px;
}
.mod_customnav2 .submenu li a:hover{
  text-decoration:none;
  margin:0;
  padding:0;
  width:180px;
  background-color: rgba(0, 0, 0, 0.8);
  color: #fff;
}
*html .mod_customnav2 li a:hover{
  display:block;
  background-color: rgba(0, 0, 0, 0.8);
  text-decoration:none;
  color:#fff;
}
.mod_customnav2 li ul{
  left:-999em;
  width:180px;
  position:absolute;
  color:#fff;
}
.mod_customnav2 li:hover ul,.mod_customnav2 li.sfhover ul{
  left:auto;
  position:absolute;
  display:block;
  color:#fff;
  background-color: rgba(0, 0, 0, 0.5);
  z-index:99999 !important;
}
.mod_customnav2 li ul li{
  display:block !important;
  width:210px;
      color:#fff;
}

.mod_customnav2 .invisible {
  display: none;
}

---

in style.css

div#header
-> add: position:relative;

div.mod_customnav2
-> delete: margin-top: 70px;
-> add: position: absolute;
-> add: bottom: 0;

By the way, there is also an international Contao-community and even a french Contao-community (new registration in both cases required). :)

thank you for your quick response ! !
Property "position: absolute;" are a problem to display the submenu
the submenu disappears !!

PS : the international Contao-community have a bug 404 error to submit a NEW TOPIC...
and the french forum don't find the solution to my probleme my topic

I have change my css and I have other probleme with the submenu... :mad:

HTML-Code:

---

.mod_customnav2{
  position:absolute;
    top:83px;
    left: 0px;
  width:960px;
    border: 0px solid #000;
    z-index: 100;
  padding:0;
  font-weight:bold;
  text-align: center;
}
.mod_customnav2 .level_1 li
{
  display: block;
  float: left;
  width: 120px;
  margin: 0;
  padding: 0;
  border: 0;
}
.mod_customnav2 .level_1 li a:link, .mod_customnav2 li a:visited
{
  display: block;
  color: #000;
  margin: 0;
  height:23px;
  padding: 4px 8px;
  border-right: 0px solid #fff;
  background: transparent url(fondTR.png) repeat;
  text-decoration: none;
}
.mod_customnav2 .level_1 li a:hover { background-color: rgba(255, 255, 255, 0.5); }


.mod_customnav2 .level_1 p
{
  display: block;
  height:22px;
  color: #000;
  background-color: rgba(255, 255, 255, 0.5);
  margin: 0;
  padding: 4px 8px;
  font-weight:bold;
  border-right: 0px solid #fff;
  text-decoration: none;
}


.mod_customnav2 .level_2
{
  display:none;
  list-style-type: none;
  margin: 0;
  padding: 0;
  border: 0;
  width: 180px;
  border: 0px solid #000;
}
.mod_customnav2 .level_2 li
{
  float: none;
  display: block;
  margin: 0;
  padding: 1px 8px 29px;
  width: 180px;
  height:2px;
  border-bottom: 0px solid transparent;
  border-right: 0px solid transparent;
}
.mod_customnav2 .level_2 li a:link, .mod_customnav2 .level_2 li a:visited
{
  display: block;
  color: #FFF;
  margin: 0;
  border: 0;
  text-decoration: none;
  background-color: rgba(0, 0, 0, 0.5);
}
.mod_customnav2 .level_2 li a:hover
{
  background-color: rgba(0, 0, 0, 0.8);
}
.mod_customnav2 .level_2 p
{
  display: block;
  visibility:hidden;
  height:22px;
  width:180px;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.8);
  margin: 0;
  padding: 3px 0px;
  font-weight:bold;
  border-right: 0px solid #fff;
  text-decoration: none;
}
.mod_customnav2 li:hover > .level_2 { display: block; }

.mod_customnav2 li.trail .level_2{}

---

now I have a probleme with IE :mad:
Could you help me please ?

which kind of problem?

some ie versions don't support pseudoclass :hover on list elements.
google for "ie hover everything" sorry but i don't know the link now.
this will add a behaviour so ie supports li:hover.

if this is the solution to your problem depends on which version you're using (and if this matches your problem, add detailed description please)