菜鸟教程在线编辑器

 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
#myDIV {
  margin-top: 10px;
  height: 250px;
  width: 250px;
  overflow: auto;
}

#content {
  height: 800px;
  width: 2000px;
  padding: 10px;
  background-color: coral;
}
</style>
</head>
<body>

<p>点击按钮获取 id="content" 元素的高度（垂直）和宽度（水平）。</p>

<button onclick="myFunction()">点我</button>

<div id="myDIV">
  <div id="content">正文部分..</div>
</div>

<p id="demo"></p>

<script>
function myFunction() {
  var elmnt = document.getElementById("content");
  var y = elmnt.scrollHeight;
  var x = elmnt.scrollWidth;
  document.getElementById ("demo").innerHTML = "高度为: " + y + "px<br>宽度为: " + x + "px";
}
</script>

</body>
</html>
              