1
2
<html>3
<head>4
<style>5
.btn6
{7
padding:10px;8
background-color:#007bff;9
border:none;10
color:white;11
}12
</style>13
</head>14
<body>15
<h1>JavaScript on load event</h1>16
<p>body background will changed after page loaded</p>17
<button class="btn">Click</button>18
<script>19
window.onload = function(){20
document.body.style.backgroundColor = "gray";21
}22
</script>23
</body>24
</html>