​x
 
<!DOCTYPE html>
<html>
<head>
<title>HTML DOM 对象</title>
</head>
<body>
​
<h1>演示如何访问 TITLE 元素</h1>
​
<p>单击该按钮可获取文档标题的文本。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementsByTagName("TITLE")[0].text;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​