显示年月日星期和(变动的)时间

<html>
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<head>
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<title>test</title>
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</head>
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<body>
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function showtime()
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{
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var today,hour,second,minute,year,month,date;
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var strDate ;
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today=new Date();
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var n_day = today.getDay();
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switch (n_day)
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{
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case 0:{
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strDate = "星期日"
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}break;
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case 1:{
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strDate = "星期一"
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}break;
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case 2:{
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strDate ="星期二"
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}break;
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case 3:{
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strDate = "星期三"
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}break;
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case 4:{
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strDate = "星期四"
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}break;
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case 5:{
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strDate = "星期五"
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}break;
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case 6:{
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strDate = "星期六"
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}break;
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case 7:{
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strDate = "星期日"
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}break;
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}
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year = today.getYear();
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month = today.getMonth()+1;
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date = today.getDate();
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hour = today.getHours();
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minute =today.getMinutes();
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second = today.getSeconds();
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if(month<10) month="0"+month;
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if(date<10) date="0"+date;
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if(hour<10) hour="0"+hour;
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if(minute<10) minute="0"+minute;
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if(second<10) second="0"+second;
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document.getElementById('time').innerHTML = year + " 年 " + month + " 月 " + date + " 日 " + strDate +" " + hour + ":" + minute + ":" + second; //显示时间
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setTimeout("showtime();", 1000); //设定函数自动执行时间为 1000 ms(1 s)
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}
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</script>
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<div></div>
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<table border = 1>
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<tr>
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<td>1</td>
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<td>1</td>
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<td ID="time"><script language="javascript"> showtime();</script></td>
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</tr>
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</body>
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</html>
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