在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    alert($("div").scrollTop()+" px");
  });
});
</script>
</head>
<body>

<div style="border:1px solid black;width:100px;height:150px;overflow:auto">
This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text. This is some text.</div><br>
<button>返回垂直滚动条的位置</button>
<p>向下移动滚动条,再次单击该按钮。</p>

</body>
</html>
源代码

动行结果
