51help TIY
码：
<!DOCTYPE html> <html> <body> <p>Hello World!</p> <div id="main"> <p>The DOM is very useful.</p> <p>本例演示 <b>getElementsByTagName</b> 方法。</p> </div> <script> var x=document.getElementById("main"); var y=x.getElementsByTagName("p"); document.write('id 为 "main" 的 div 文本是：' + y[0].innerHTML); </script> </body> </html>
查看结果: