​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>Hello World!</p>
<p>DOM 很有用！</p>
<p>本例演示 <b>length</b> 属性。</p>
​
<script>
x=document.getElementsByTagName("p");
for (i=0;i<x.length;i++)
  { 
  document.write(x[i].innerHTML);
  document.write("<br>");
  }
</script>
</body>
</html>
​