<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin: 0;
padding: 0;
}
body{
background-color: #000;
text-align: center;
padding: 200px;
}
#pic{
display: none;
}
#time{
font-size: 200px;
color:red;
}
</style>
</head>
<body>
<div id="time">5</div>
<img id="pic" src="images/flower.gif" alt="">
</body>
<script>
window.onload = function (ev) {
var intervalID = setInterval(function () {
var time = $('time');
time.innerText -= 1 ;
// 清除定时器
if (time.innerText ==='0') {
clearInterval(intervalID);
$('pic').style.display = 'block';
time.style.display = 'none';
}
}, 1000);
function $(id) {
return typeof id === 'string' ? document.getElementById(id):null;
}
}
</script>
</html>