根据时间更换图片和文字
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
</style>
</head>
<body>
<img src="" id="img">
<p id="p"></p>
<script>
var time=new Date().getHours();
// document.write(time);
if(time>=0 && time <=12){
f1("images/moring.jpg","早上好，要好好打代码哦~");
}else if(time<=18 && time >12){
f1("images/xia.gif","下午好，要好好打代码哦~");
}else if(time>18 && time <=24){
f1("images/night.jpg","晚上好，要好好打代码哦~");
}
function f1(img,p){
document.getElementById("img").src=img;
document.getElementById("p").innerHTML=p;
}
</script>
</body>
</html>
