<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>选项卡</title>
<style>
#container div {
width: 300px;
height: 200px;
border: 3px solid red;
display: none;
margin-top: 10px;
text-align: center;
line-height: 200px;
font-size: 30px;
}
#container div.active {
display: block;
}
button {
outline: none;
border: 2px solid gray;
border-radius: 5px;
}
button.active {
background-color: orange;
}
</style>
</head>
<body>
<div id="wrap">
<button class="active">选项一</button>
<button>选项二</button>
<button>选项三</button>
<button>选项四</button>
<div id="container">
<div class="active">
内容一
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
</div>
<div>内容二</div>
<div>内容三</div>
<div>内容四</div>
</div>
</div>
<script>
var oWrap = document.getElementById('wrap')
var oBtn = oWrap.getElementsByTagName('button')
var oCon = document.getElementById('container')
var oDiv = oCon.getElementsByTagName('div')
for (var i = 0; i < oBtn.length; i++) {
oBtn[i].index = i
oBtn[i].onclick = function () {
for (var j = 0; j < oBtn.length; j++) {
oBtn[j].style.backgroundColor = 'white'
oDiv[j].style.display = 'none'
}
this.style.backgroundColor = 'orange'
oDiv[this.index].style.display = 'block'
}
}
</script>
</body>
</html>