Web Page Overlay Tutorial Transparent Cover
Learn two different ways of applying overlays and transparent covers to your page data. It is most commonly used to bring a special new window to the user's attention while the page they are on fades back temporarily.
<!DOCTYPE html>
<html>
<head>
<style>
div#overlay {
display: none;
z-index: 2;
background: #000;
position: fixed;
width: 100%;
height: 100%;
top: 0px;
left: 0px;
text-align: center;
}
div#specialBox {
display: none;
position: relative;
z-index: 3;
margin: 150px auto 0px auto;
width: 500px;
height: 300px;
background: #FFF;
color: #000;
}
div#wrapper {
position:absolute;
top: 0px;
left: 0px;
padding-left:24px;
}
</style>
<script>
function toggleOverlay(){
var overlay = document.getElementById('overlay');
var specialBox = document.getElementById('specialBox');
overlay.style.opacity = .8;
if(overlay.style.display == "block"){
overlay.style.display = "none";
specialBox.style.display = "none";
} else {
overlay.style.display = "block";
specialBox.style.display = "block";
}
}
</script>
</head>
<body>
<!-- Start Overlay -->
<div id="overlay"></div>
<!-- End Overlay -->
<!-- Start Special Centered Box -->
<div id="specialBox">
<p>Special box content ...</p>
<button onmousedown="toggleOverlay()">Close Overlay</button>
</div>
<!-- End Special Centered Box -->
<!-- Start Normal Page Content -->
<div id="wrapper">
<h2>My web page heading</h2>
<p>Some web page content ...</p>
<button onmousedown="toggleOverlay()">Apply Overlay</button>
</div>
<!-- End Normal Page Content -->
</body>
</html>