<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
img{
position: absolute;
left: 0px;
top: 0px;
width: 200px;
height: 150px;
z-index: -1;
}
</style>
</head>
<body>
<h1>CSS z-index Property</h1>
<img src="car-left.png">
<p>This is a paragraph.</p>
<button onclick="myFunction()">Click Me</button>
<script>
var x = document.getElementsByTagName("img")[0];
function myFunction(){
x.style.zIndex = "1";
}
</script>
<p><strong>Note</strong>: Click on the button to change the z-index from -1 to 1.</p> </body>
</html>