<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js changeAttribute</title>
<script src="lib/jquery/jquery-3.2.1.js"></script>
</head>
<body>
<img id="img" src="img/bulbOn.gif" width="160" height="120">
<script>
// document.getElementById("img").src="img/landscape.jpg";
$("#img").attr("src", "img/landscape.jpg");
</script>
</body>
</html>
