为什么改了b0ttom 为50是距离上面啊?改了left 不是距离左边吗?
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>relative样式</title>
<style type="text/css">
#div1{
width:200px;
height:200px;
border:2px red solid;
position:fixed;
bottom:50;
right:20;