JS——百度背景图

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body{
            background-image: url("image/1.jpg");
        }
        div{
            margin-top: 10px;
            padding-top: 50px;
            height: 150px;
            text-align: center;
            background: rgba(255,255,255,0.3);
        }
        img{
            width: 150px;
            margin: 0 10px;
            cursor: pointer;
        }
    </style>
</head>
<body>
<div>
    <img src="data:image/1.jpg">
    <img src="data:image/2.jpg">
    <img src="data:image/3.jpg">
    <img src="data:image/4.jpg">
    <img src="data:image/5.jpg">
</div>
<script>
var imgArr=document.getElementsByTagName("img");
for (var i = 0; i < imgArr.length; i++) {
    imgArr[i].onclick=function () {
        document.body.style.backgroundImage="url("+this.src+")";
    }
}
</script>
</body>
</html>