window.onload()函数的使用-优快云博客

本文链接：https://blog.youkuaiyun.com/lei2350934xj/article/details/72724349

<!DOCTYPE html>

<html lang="">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title></title>
<style>
.btn{
width:100px;
height:30px;
margin-left:10px;
color:white;
font-size:16px;
line-height: 30px;
text-align: center;
background-color: #b208e5;
}
div{
width:100px;
height:100px;
background-color: deepskyblue;
margin-top:10px;
display: none;
}

</style>

</head>

<body>

<button class="btn" οnclick="showBox('1')">show div1</button>
<button class="btn" οnclick="showBox('2')">show div2</button>
<button class="btn" οnclick="showBox('3')">show div3</button>
<button class="btn" οnclick="showBox('4')">show div4</button>
<div id="box1">1</div>
<div id="box2">2</div>
<div id="box3">3</div>
<div id="box4">4</div>
</body>
</html>
<script>
// window.onload = function(){
var box1 = document.getElementById("box1");
var box2 = document.getElementById("box2");
var box3 = document.getElementById("box3");
var box4 = document.getElementById("box4");

function showBox(num1){
// alert(222);
switch(num1){
case '1':box1.style.display = "block";break;
case '2':box2.style.display = "block";break;
case '3':box3.style.display = "block";break;
case '4':box4.style.display = "block";break;
default:break;
}
}
// }
</script>