MyJavaScriptCode/changeBackGround.html at master · YuHe0108/MyJavaScriptCode · GitHub

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<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title>网页换肤</title>
	<link rel="stylesheet" href="">
	<style>
		* {
			margin: 0;
			padding: 0;
			list-style: none;
			vertical-align: top;
		}
		body{
			background: url("background/back1.jpg");
		}
		.c_father {
			position: relative;
			height: 100%;
			width: 100%;
		}
		ul {
			width: 100%;
			display: flex;
			align-items: center;
			justify-content: space-around;
			display: none;
		}
		ul li img {
			margin-top: 30px;
			height: 118px;
			width: 178px;
			cursor: pointer;
		}
		.c_icons {
			position: absolute;
			width: 50px;
			height: 50px;
			left: 45%;
			cursor: pointer;
		}
	</style>
	<script>
		window.onload = function () {
			var oImg = document.getElementById("i_son");
			var aImgs = oImg.getElementsByTagName("img");
			var oDiv = document.getElementById("i_father");
			for (var i = 0; i < aImgs.length; i++) {
				aImgs[i].index = i + 1;
				aImgs[i].onclick = function () {
					document.body.style.background = 'url("background/back'+ this.index +'.jpg")';
				};
			}

			var oIcon = document.getElementById("i_icons");
			var oUl = document.getElementById("i_img");
			oIcon.index = 0;
			oIcon.onclick = function () {
				if (this.index % 2 === 0) {
					oUl.style.display = "flex";
				} else {
					oUl.style.display = "none";
				}
				this.index ++;
			};
		};
	</script>
</head>
<body>
	<div id="i_father" class="c_father">
		<div id="i_son" claas="c_son">
			<ul id="i_img">
				<li><img src="background/back1.jpg" alt=""></li>
				<li><img src="background/back2.jpg" alt=""></li>
				<li><img src="background/back3.jpg" alt=""></li>
				<li><img src="background/back4.jpg" alt=""></li>
				<li><img src="background/back5.jpg" alt=""></li>
			</ul>
		</div>
		<img src="icons/down.png" alt="" id="i_icons" class="c_icons">
	</div>
</body>
</html>