css dropdown not displaying properly in IE

[ospazzo]

hi all --

i'm styling a dropdown menu in CSS and everything looks great, except for the fact that the submenu (part of #topnav) drops behind the rest of the site's content (such as div.moduleMid). This problem only happens in Internet Explorer. (So you can only see it for a few lines until it drops behind another div)

somebody told me this may have to do with z-indexing, but i'm not very familiar with using the z-index property. i did some research into z-index and tried applying it in several ways, but to no avail.

here's is what the code looks like:



@charset "UTF-8";

@font-face {
font-family: "TNC";
src: url("http://www.lukeelmers.com/tnc/RNS-B__2.TTF");
}

body {
margin: 0;
background-image:url(http://lukeelmers.com/images/bg.gif);
background-color:#ffffff;
background-attachment: scroll;
background-position:top center;
background-repeat:no-repeat;
margin-top: -40px;
font-family:arial;
font-size:12px;
font-weight:normal;
text-transform:lowercase;
text-decoration:none;
}
div.wrap {
width:960px;
background-color:transparent;
}
div#searchbar {
background-color: transparent;
visibility: hidden;
}
div#topnav {
background-image: url(http://i28.photobucket.com/albums/c219/ospazzo/header_bg960.png);
background-color: transparent;
background-repeat: no-repeat;
background-attachment: scroll;
height:90px;
}
div#header {
position: relative;
background-color: transparent;
}
div#header div div {
background-color: transparent;
margin-top: -90px;
}
#topnav {
background-color:#444444;
}
#topnav ul {
border-right:0;
}
#topnav ul li {
border-left:0;
}
#topnav ul li a {
color:#ffffff;
font-size: 13px;
font-weight: bold;
}
#topnav ul li a:hover {
background-color:#444444;
color:#444444;
text-decoration:none;
}
#topnav ul.subMenu a:link {
color: #444444;
}
#topnav li.dropDown:hover ul.subMenu a:hover,#topnav li.hover ul.subMenu a:hover, #topnav ul.subMenu a {
background: #ffffff;
color: #444444;
}
#topnav ul li.dropDown:hover a,#topnav ul li a:hover {
background: #444444;
color: #ffffff;
}
#topnav ul.subMenu, #topnav ul li.hover a,#topnav ul li.hover a:hover {
background-color: #444444;
}
#topnav ul, #topnav ul li {
border: none;
}
#topnav ul li.dropDown:hover a,
#topnav ul li.hover a, #topnav ul a:hover, #topnav ul li.hover a:hover {
color: #ffffff;
}
#topnav ul.subMenu {
border: 0;
}
#topnav li.dropDown:hover ul.subMenu a:hover,
#topnav li.hover ul.subMenu a:hover {
color: #444444;
}
#topnav ul li a small, #topnav ul li a small {
color: #ffffff;
font-size: 10px;
}
#topnav ul li a:hover small, #topnav ul li a.hover small {
color: #ffffff;
font-size: 10px;
}
ul.contactLinks {
float: right;
padding-right: 5px;
text-align: right;
width: 42%;
overflow-x: hidden;
overflow-y: hidden;
white-space: nowrap;
position: absolute;
left: 520px;
top: 38px;
}
div.moduleMid {
background-color:#ffffff;
outline: dashed;
outline-color:#999999;
padding: 10px;
}
div[id~=footer] a {
font-family:arial;
font-size:10px;
font-weight:normal;
text-decoration:none;
text-transform:lowercase;
}
div[id~=footer] div {
padding:10px 0;
}
div.moduleBody a {
font-size:12px;
letter-spacing:0px;
text-decoration:none;
text-transform:lowercase;
font-weight:bold;
}
div.basicDetails h2 {
font-family: "TNC", Arial Rounded MT Bold, Arial Black, Arial;
color:#FF0000;
font-size:42px;
letter-spacing:-1px;
text-transform: uppercase;
font-weight:bold;
}
h2 {
font-family:arial;
font-size:10px;
background-color:transparent;
text-transform:uppercase;
font-weight:bold;
}
h3.moduleHead {
font-family: "TNC", Arial Rounded MT Bold, Arial Black, Arial;
font-weight:bold;
color:#444444;
font-size:22px;
text-transform:uppercase;
background:#cccccc;
}
h4 {
font-family:arial;
font-size:12px;
text-transform:uppercase;
font-weight:bold;
padding-left:0px;
}
strong {
font-family:arial;
font-size:10px;
text-transform:uppercase;
font-weight:bold;
padding-left:0px;
padding-right:0px;
}
a:link, a:active, a:visited {
color:#000000;
font-size: 12px;
font-weight: bold;
}
a:hover, div[id~=footer] a:hover, div.moduleBody a:hover {
color:#000000;
}


i'm also trying to figure out how to use CSS to embed fonts (my current treatment only works in safari), but that's just a minor detail.

any help would be GREATLY appreciated.

take care,

luke

[ospazzo]

never mind -- i figured out the issue! i used z-index to modify the following items:



#topnav ul.subMenu {
border: 0;
position: absolute;
z-index: 500;
}
div.moduleMid {
background-color:#ffffff;
outline: dashed;
outline-color:#999999;
padding: 10px;
position: relative;
z-index: 100;
}


this seemed to do the trick!