1.代码部分：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
html{
height: 100%;
}
body{
position: relative;
height: 100%;
}
.box1{
50px;
height: 50px;
background-color: blue;
position: absolute;
right: 10px;
bottom: 10px;
margin-bottom: 10px;
}
</style>
</head>
<body>
<button>点击添加元素<tton>
</body>
<ml>
<script type="text/javascript" src="
static/jquery-1.12.3.js”>
<script type="text/javascript">
i=-1;
$('button').on('click',function(){
i++;
$('body').append('<div style="bottom:'+i*55+'px" class="box1"></div>');
})
</script>
结果：自己看吧，o(^▽^)o