xxxxxxxxxx<html><head><meta charset="utf-8"><title>W3Cschool教程(w3cschool.cn)</title></head><body><script type="text/javascript">var d = new Date();var time = d.getHours();if (time<10){ document.write("<b>早上好</b>");}else if (time>=10 && time<20){ document.write("<b>今天好</b>");}else{ document.write("<b>Hello World!</b>");}</script><p>这个例子演示了 if..else if...else 语句。</p></body></html>