BootWiki教程网
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>BootWiki 教程网</title> </head> <body> <img height="126" src="planets.gif" usemap="#planetmap" width="145"> <map name="planetmap"> <area alt="Venus" coords="124,58,8" href="venus.htm" id="venus" shape="circle"> </map> <p>金星区域的 protocol: <script> document.write(document.getElementById('venus').protocol); </script> </p> </body> </html>
运行结果