51help TIY
码：
<html> <head> <base id="myBaseId" href="../htmldom/index.htm" tppabs="http://www.51help.tk/htmldom/" /> </head> <body> <p>Base id: <script type="text/javascript"> x=document.getElementsByTagName('base')[0]; document.write(x.id); </script></p> </body> </html>
查看结果: