源代码:
<html><!DOCTYPE html> <html> <body> <p>Hello World!</p> <div id="main"> <p>The DOM is very useful.</p> <p>This example demonstrates the <b>getElementsByTagName</b> method</p> </div> <script> x=document.getElementById("main").getElementsByTagName("p"); document.write("First paragraph inside the div: " + x[0].innerHTML); </script> </body> </html>
运行结果：