<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
#div1{
width: 100px;
height: 200px;
background: red;
position: absolute;
left: 0;
top: 100px;
}
#div2{
width: 30px;
height: 60px;
background: black;
position: absolute;
right: -30px;
top: 70px;
color: #fff;
text-align: center;
}
</style>
<script>
window.onload=function(){
var oDiv=document.getElementById("div1");
oDiv.onmouseover=function(){
this.style.left='0px';
}
oDiv.onmouseout=function(){
this.style.left='-100px';
}
}
</script>
</head>
<body>
<div id="div1">
<div id="div2">分享到</div>
</div>
</body>
</html>
