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2024-10-20 05:52:19

<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="UTF-8">

<title>Document</title>

</head>

<style type="text/css">

*{

padding: 0;

margin: 0;

}

ul,li{

list-style: none;

}

#warp{

width: 600px;

height: auto;

margin: 0 auto;

margin-top: 20px;

}

#warp .content p{

width: 300px;

height: 30px;

background-color: #000;

color: #fff;

line-height: 30px;

text-align: center;

}

#warp .content+ .content{

margin-top: 2px;

}

#warp .content ul{

display: none;

}

#warp .content ul.on{

display: block;

}

#warp .content li{

background-color: #ccc;

width: 300px;

text-align: center;

}

#warp .content li + li{

margin-top: 1px;

}

</style>

<body>

<div id="warp">

<div class="content">

<p>动物</p>

<ul>

<li>猴子</li>

<li>大象</li>

<li>狮子</li>

</ul>

</div>

<div class="content">

<p>山川</p>

<ul>

<li>长江</li>

<li>黄河</li>

<li>井水</li>

</ul>

</div>

<div class="content">

<p>美女</p>

<ul>

<li>貂蝉</li>

<li>西施</li>

<li>秀秀</li>

</ul>

</div>

</div>

<script>

let oP = document.getElementsByTagName("p"),

aUl = document.getElementsByTagName("ul"),

index;

console.log(oP.length);

for(var i=0;i<oP.length;i++){

oP[i].index = i;

oP[i].onclick = function(){

index = this.index;

aUl[index].className = aUl[index].className === ""? "on" : "";

console.log(i)

}

}

</script>

</body>

</html>

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