Stacking components on top of one another using CSS

I have been experimenting with a dynamic sliding jQuery menu. By adjusting the drop-down area slightly upward using a negative margin, I was hoping to layer the dropdown on top of its parent element that triggers the action. I attempted using z-index without success. Can anyone help me figure out what I am missing?

Check out the live version here:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Sliding Menu Tutorial | HV-DESIGNS.CO.UK</title>
<link href="style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/slider.js"></script>

</head>

<body>
<div id="container">
<div id="header">
</div>

<div id="button">
<div id="trigger">
<img src="images/button.png" width="184" height="32" class="menu_class" />
</div>
<ul class="the_menu">
<li><a href="#">A Website #1</a></li>
<li><a href="#">A Website #2</a></li>
<li><a href="#">A Link #1</a></li>
<li><a href="#">A Link #2</a></li>
<li><a href="#">A Website #3</a></li>
<li><a href="#">A Website #4</a></li>
<li><a href="#">A Link #3</a></li>
<li><a href="#">A Link #4</a></li>
</ul>
</div>

</div>
</body>
</html>

body {
    font-family:Arial, Helvetica, sans-serif;
    font-size:12px;
    background-color: #333333;
}

#container {
    margin: auto;
    width: 490px;
}

#header {
    background-image: url(images/header.png);
    background-repeat: no-repeat;
    height: 42px;
    width: 490px;
    margin-bottom: 20px;
}

#button {
    height: 32px;
    width: 184px;
    margin: auto;
}

ul, li {
    margin:0; 
    padding:0; 
    list-style:none;
}

.menu_class {
    border:1px solid #1c1c1c;

}
#trigger {
    z-index:-1;
}
.the_menu {
    display:none;
    width:300px;
    border: 1px solid #1c1c1c;
    margin:-50px 0 0 50px;
    z-index:100;
}

.the_menu li {
    background-color: #302f2f;
}

.the_menu li a {
    color:#FFFFFF; 
    text-decoration:none; 
    padding:10px; 
    display:block;
}

.the_menu li a:hover {
    padding:10px;
    font-weight:bold;
    color: #F00880;
}

Answer №1

To properly position the elements, you must specify the CSS properties. Start by setting position: relative for the "parent" element. Next, add position: absolute to the "child" element.

By doing this, the child element will be positioned "absolute" in relation to the parent. You can then use CSS to adjust the position of the child element. For example:

left: 0;
top: 0;

This code snippet will align the top-left corners of both the parent and child elements.

Answer №3

To improve the design, consider changing the menu's position to relative. Keep in mind that z-index may not be effective on elements with a default position of static.

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