xxxxxxxxxx<html><head> <meta charset="utf-8"> <title>W3Cschool在线教程(w3cschool.cn)</title> </head><body><img src="/statics/images/course/planets.gif" width="145" height="126" usemap="#planetmap"><map name="planetmap"><area id="venus" shape="circle" coords="124,58,8" alt="The planet Venus" href="venus.htm"></map><p>金星的替代文本:<script>document.write(document.getElementById("venus").alt);</script></p></body></html>