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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin:0;
padding:0;
}
.btns{
position:fixed;
top: 0;
left: 0;
z-index:999;
}
.body{
width:100%;
height:100%;
}
.list{
box-sizing:border-box;
padding-top:30px;
position:absolute;
left: 0;
top: 0;
width:100%;
height:100%;
display:none;
}
.list:nth-child(1){
background-color:red;
}
.list:nth-child(2){
background-color:blue;
}
.list:nth-child(3){
background-color:green;
}
</style>
</head>
<body>
<div class="btns">
<button>按钮一</button>
<button>按钮二</button>
<button>按钮三</button>
</div>
<div class="body">
<div class="list">页面一</div>
<div class="list">页面二</div>
<div class="list">页面三</div>
</div>
<script src="../js/jquery@2.2.4.js"></script>
<script>
$(function(){
$("button").on("click",function(){
$(".list").eq($(this).index()).fadeIn(1000).siblings().fadeOut(1000)
})
})
</script>
</body>
</html>