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