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<!DOCTYPE html>
<html>
<head>
<style> 
div {position: absolute;}
​
#container div {
  background-color: lightblue;
  border: 1px solid #333333;
  width: 100px;
  height: 100px;
  opacity: 0.5;
}
​
div#myBox {
  opacity: 1;
  background-color: coral;
  z-index: 1;
  animation: mymove 5s infinite linear;
}
​
@keyframes mymove {
  50% {z-index: 5;}
}
</style>
</head>
<body style="position:absolute">
​
<h1>Animation of z-index</h1>
​
<p>Gradually change the z-index property of "myBox" from 1 to 5, and back to 1:<p>
<div id="container">
  <div id="myBox">myBox</div>
  <div style="top:20px;left:20px;z-index:1;">z-index 1</div>
  <div style="top:40px;left:40px;z-index:2;">z-index 2</div>
  <div style="top:60px;left:60px;z-index:3;">z-index 3</div>
  <div style="top:80px;left:80px;z-index:4;">z-index 4</div>
</div>
​
<p><strong>Note:</strong> CSS Animations do not work in Internet Explorer 9 and earlier versions.</p>
​
</body>
​
<!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss_anim_z-index by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:36:21 GMT -->
</html>
​
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