Sub-Nav. hiding behind my slider .

How can i fix this ? The sub-nav. is hiding, its on behind of the slider . Help please .
If the problem is in the CSS, please help me .
Here's my CSS code :

Code:

ul.topnav {
  list-style: none;
  padding: 0 20px;
  margin: 0;
  float: left;
  width: 968px ;
  background: #222;
  font-size: 1.2em;
  background: url(http://i53.tinypic.com/fk1r7l.gif) repeat-x;
}
ul.topnav li {
  float: left;
  margin: 0;
  padding: 0 15px 0 0;
  position: relative; /*--Declare X and Y axis base for sub navigation--*/
}
ul.topnav li a{
  padding: 10px 5px;
  color: #fff;
  display: !important;
  text-decoration: none;
  float: left;
}
ul.topnav li a:hover{
  background: url(http://i51.tinypic.com/hs74w1.gif) no-repeat center top;
}
ul.topnav li span { /*--Drop down trigger styles--*/
  width: 17px ;
  height: 35px;
  float: left;
  background: url(http://i55.tinypic.com/jq3hno.gif) no-repeat center top;
}
ul.topnav li span.subhover {background-position: center bottom; cursor: pointer;} /*--Hover effect for trigger--*/
ul.topnav li ul.subnav {
  list-style: none;
  position: absolute; /*--Important - Keeps subnav from affecting main navigation flow--*/
  left: 0; top: 35px;
  background: #333;
  margin: 0; padding: 0;
  display: none;
  float: left;
  width: 170px ;
  border: 1px solid #111;
}
ul.topnav li ul.subnav li{
  margin: 0; padding: 0;
  border-top: 1px solid #252525; /*--Create bevel effect--*/
  border-bottom: 1px solid #444; /*--Create bevel effect--*/
  clear: both;
  width: 170px ;
}
html ul.topnav li ul.subnav li a {
  float: left;
  width: 145px ;
  background: #333 url(http://i54.tinypic.com/2qamloo.gif) no-repeat 10px center;
  padding-left: 20px;
}
html ul.topnav li ul.subnav li a:hover { /*--Hover effect for subnav links--*/
  background: #222 url(http://i54.tinypic.com/2qamloo.gif) no-repeat 10px center;
}


Thanks.

I can't see if you have it transparent,
im pretty bad at CSS. But may i have the link of you forums. Maybe what would help is to reduce the size of the image?

Someone may help me ?

mark1111 wrote:Someone may help me ?

you have to change the z-index property in the css. Either you have to increase the index value for the said menu; or you have to lower it for the nivo slider

Code:

ul.topnav {
  list-style: none;
  padding: 0 20px;
  margin: 0;
  float: left;
  width: 968px ;
  background: #222;
  font-size: 1.2em;
  background: url(http://i53.tinypic.com/fk1r7l.gif) repeat-x;
  z-index: 999; (must be greater than nivo slider index value)
}

learn more about this property here:
http://www.w3schools.com/cssref/pr_pos_z-index.asp or
http://webdesign.about.com/cs/css/a/aazindex.htm