效果图如下：
HTML代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.left,.right{
position: fixed;
top: 250px;
}
.left{
left: 0;
}
.right{
right: 0;
}
.left span,.right span{
20px;
height: 20px;
background: #ccc;
font-size: 14px;
color: #333;
position: absolute;
right: 0;
top: 0;
text-align: center;
cursor: pointer;
}
</style>
<script src="js/jquery-1.12.4.min.js"></script>
<script>
$(function(){
$('span').click(function(){
$(this).parent().hide(500);
});
})
</script>
</head>
<body>
<div class="left"><img src="images/left.jpg" alt=""><span>X</span></div>
<div class="right"><img src="images/right.jpg" alt=""><span>X</span></div>
</body>
</html>