<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {font-family: Arial;}
.tab { overflow: hidden;
border: 1px solid #ccc;
background-color: #f1f1f1;
}
.tab button { background-color: inherit;
float: left;
border: none;
outline: none;
cursor: pointer;
padding: 14px 16px;
transition: 0.3s;
font-size: 17px;
}
.tab button:hover { background-color: #ddd;
}
.tab button.active { background-color: #ccc;
}
.tabcontent { display: none;
padding: 6px 12px;
border: 1px solid #ccc;
border-top: none;
}
</style>
</head>
<body>
<h2>选项卡</h2>
<p>单击选项卡式菜单内的按钮：</p>
<div class="tab">
<button class="tablinks" onclick="openCity(event, 'London')">伦敦</button>
<button class="tablinks" onclick="openCity(event, 'Paris')">巴黎</button>
<button class="tablinks" onclick="openCity(event, 'Tokyo')">东京</button>
</div>
<div id="London" class="tabcontent">
<h3>伦敦</h3>
<p>伦敦是英格兰的首都。</p>
</div>
<div id="巴黎" class="tabcontent">
<h3>巴黎</h3>
<p>巴黎是法国的首都。</p>
</div>
<div id="Tokyo" class="tabcontent">
<h3>东京</h3>
<p>东京是日本的首都。</p>
</div>
<script>
function openCity(evt, cityName) { var i, tabcontent, tablinks;
tabcontent = document.getElementsByClassName("tabcontent"); for (i = 0; i < tabcontent.length; i++) { tabcontent[i].style.display = "none";
}
tablinks = document.getElementsByClassName("tablinks"); for (i = 0; i < tablinks.length; i++) { tablinks[i].className = tablinks[i].className.replace(" active", ""); }
document.getElementById(cityName).style.display = "block";
evt.currentTarget.className += " active";
}
</script>
</body>
</html>