<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.menu{
float: left;width: 30%;height: 500px;background-color: antiquewhite;
}
.content{
float: left;width: 70%;height: 500px;background-color: blue;
}
.title{
background-color: black;
color: white;
height: 50px;
line-height: 50px;
}
.hide{
display: none;
} </style>
</head>
<body>
<div>
<div class="menu">
<div class="item">
<div class="title" onclick="Func(this);">菜单一</div>
<div class="body ">
<div>1.1</div>
<div>1.2</div>
<div>1.3</div>
</div>
</div>
<div class="item">
<div class="title"onclick="Func(this);">菜单二</div>
<div class="body hide">
<div>2.1</div>
<div>2.2</div>
<div>2.3</div>
</div>
</div>
<div class="item">
<div class="title"onclick="Func(this);">菜单三</div>
<div class="body hide">
<div>3.1</div>
<div>3.2</div>
<div>3.3</div>
</div>
</div> </div>
<div class="content"></div>
</div>
<script src="jquery-3.2.1.js"></script>
<script>
function Func(ths) {
console.log($(ths).text());
$(ths).next().removeClass('hide');
$(ths).parent().siblings().find('.body').addClass('hide'); }
</script>
</body>
</html>