在按钮上显示当前系统详细日期与动态时间，并能自动判断星期几，结合自己网站的需求来修改即可。
<script language="JavaScript">
var timerID = null;
var timerRunning = false;
// Called by both onLoad in BODY tag, and Resume button.
function startclock ()
{
// Make sure the clock is stopped
stopclock();
time();
}
// Kills clock.
function stopclock ()
{
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
function time ()
{//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
var now = new Date();
var yr = now.getYear()+1900;
var mName = now.getMonth() + 1;
var dName = now.getDay() + 1;
var dayNr = ((now.getDate()<10) ? "0" : "")+ now.getDate();
var ampm = (now.getHours() >= 12) ? " P.M." : " A.M."
var hours = now.getHours();
hours = ((hours > 12) ? hours - 12 : hours);
var minutes = ((now.getMinutes() < 10) ? ":0" : ":") +
now.getMinutes();
var seconds = ((now.getSeconds() < 10) ? ":0" : ":") +
now.getSeconds();
if(dName==1) Day = "Sunday";
if(dName==2) Day = "Monday";
if(dName==3) Day = "Tuesday";
if(dName==4) Day = "Wednesday";
if(dName==5) Day = "Thursday";
if(dName==6) Day = "Friday";
if(dName==7) Day = "Saturday";
if(mName==1) Month="January";
if(mName==2) Month="February";
if(mName==3) Month="March";
if(mName==4) Month="April";
if(mName==5) Month="May";
if(mName==6) Month="June";
if(mName==7) Month="July";
if(mName==8) Month="August";
if(mName==9) Month="September";
if(mName==10) Month="October";
if(mName==11) Month="November";
if(mName==12) Month="December";
// String to display current date.
var DayDateTime=(" "
+ Day
+ " "
+ Month
+ " "
+ dayNr
+ ", "
+ ""
+ yr
+ " "
+ hours
+ minutes
+ seconds
+ " "
+ ampm
);
// Displays Day-Date-Time on the staus bar.
document.clock.face.value=DayDateTime;
timerID = setTimeout("time()",1000);
timerRunning = true;
}
// Stops clock and clears status bar.
function clearStatus()
{
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
window.status=" ";
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
// -- End Hiding Here -->
</script>
<body onLoad="startclock ()">
<a href="https://www.wuming.ren">武鸣人</a>，各种信息资源免费发布，分享励志语录经典短句，减肥健身常识，各种js特效代码。网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)<hr>
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<script type="text/javascript" src="https://www.wuming.ren/ad/tc.js"></script>
<script type="text/javascript" src="https://www.wuming.ren/ad/a.js"></script>
<form name="clock" onSubmit="0">
<input type="button" name="face" size="20" value=" JavaScript!! ">
</form>
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