<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
li {
list-style: none;
}
img {
border: 0px;
vertical-align: middle;
width: 192px;
}
div {
width: 768px;
height: 120px;
}
div ul {
overflow: hidden;
background-color: pink;
margin: 100px auto;
}
div ul li {
float: left;
width: 192px;
height: 108px;
cursor: pointer;
}
body {
background: url(images/1.jpg) no-repeat center top;
}
</style>
</head>
<body>
<div>
<ul>
<li><img src=/img/images/1.jpg></li>
<li><img src=/img/images/2.jpg></li>
<li><img src=/img/images/3.jpg></li>
<li><img src=/img/images/4.jpg></li>
</ul>
</div>
<script>
var img = document.querySelector("ul").querySelectorAll("img");
for (var i = 0; i < img.length; i++) {
img[i].onclick = function () {
document.body.style.backgroundImage = "url(" + this.src + ")";
};
}
</script>
