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老师批语：
使用循环给每个a标签添加事件，单击选项卡的时候切换图片
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>使用事件给a标签添加的单击事件(结合循环遍历给a标签添加事件，达到点击就切换的效果)2019.05.08</title>
<style>
.box {
width: 500px;
height: 700px;
background-color: #efefef;
border: 1px solid lightgray;
margin: 20px auto;
text-align: center;
color: #636363;
box-shadow: 2px 2px 2px #999;
}
.box ul {
margin:0;
padding:0;
/*将ul转为BFC独立块,使之不受内部浮动元素的影响*/
overflow: hidden;
}
.box ul li {
list-style-type: none;
float:left;
background-color: skyblue;
margin-left: 20px;
}
.active {
font-size:1.2em;
background-color: coral;
}
.box ul li a {
/*将a转为块元素,并设置为li的宽高,这样可以使整个li可以被点击*/
display: block;
width: 100px;
height: 40px;
line-height: 40px;
color: white;
text-decoration: none;
}
.box ul li:hover {
font-size:1.2em;
background-color: coral;
}
.box .pic {
width: 450px;
height:450px;
border: 1px solid lightgray;
margin: 50px auto 0;
}
.box .pic img {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div class="box">
<h2>明星相册</h2>
<ul>
<li>
<a href="https://img.alicdn.com/simba/img/TB1T8F2TMHqK1RjSZFESuwGMXXa.jpg" title="《楚乔传》,《花千骨》,《陆贞传奇》...">赵丽颖</a>
</li>
<li>
<a href="https://img.alicdn.com/simba/img/TB1mxi7IgHqK1RjSZFPSuwwapXa.jpg" title="《倚天屠龙记》,《咱们经婚吧》,《爱无悔》...">高圆圆</a>
</li>
<li>
<a href="https://img.alicdn.com/simba/img/TB1Kp09WXzqK1RjSZFvSuwB7VXa.jpg" title="《那年花开月正圆》,《甑环传》,《玉观音》...">孙俪</a>
</li>
<li>
<a href="https://img.alicdn.com/simba/img/TB1cH06gnZmx1VjSZFGSuux2XXa.jpg" title="《还珠格格》,《武媚娘传奇》,《我不是潘金莲》...">范冰冰</a>
</li>
</ul>
<div class="pic">
<img src="images/zwt.png" alt="" id="img">
</div>
<p id="info"></p>
</div>
<script>
//1.获取页面元素
var pic = document.getElementsByTagName('a');
var img = document.getElementById('img');
var p = document.getElementById('info');
//2.循环遍历a给每个a添加事件
for(var i = 0;i < pic.length;i += 1){
pic[i].onclick = function(){
//锁定选项卡效果
for(var i = 0;i < pic.length;i += 1){
pic[i].classList.remove('active');
}
this.classList.add('active');
//3.获取基本信息
var picUrl = this.href;
var picName = this.title;
var picInfo = this.innerHTML;
img.src = picUrl;
p.innerHTML = '<span style="color:coral;">' + picInfo + picName + '</span>';
return false;
};
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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