下面为大家附上代码：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>JS时间</title><style></style> </head><body><div id="time"></div><script type="text/javascript">function time(){var vWeek,vWeek_s,vDay;vWeek = ["星期天","星期一","星期二","星期三","星期四","星期五","星期六"];var date = new Date();year = date.getFullYear();month = date.getMonth() + 1;day = date.getDate();hours = date.getHours();minutes = date.getMinutes();seconds = date.getSeconds();vWeek_s = date.getDay();document.getElementById("time").innerHTML = year + "年" + month + "月" + day + "日" + "\t" + hours + ":" + minutes +":" + seconds + "\t" + vWeek[vWeek_s] ;};setInterval("time()",1000);</script></body></html>如果有错误或者有更好的方法实现效果，欢迎您来指导！！！
用JS实现实时显示系统时间
原文地址：http://www.cnblogs.com/yidaixiaohui/p/7742746.html