js显示当前系统时间

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<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JS显示当前时间三种显示方式-懒人建站</title>
<meta name="keywords" content="网页特效,网页模板,导航菜单,焦点幻灯片,JS代码" />
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</head>
<body>
<script language=JavaScript>
<!--
var enabled = 0; today = new Date();
var day; var date;
if(today.getDay()==0) day = " 星期日"
if(today.getDay()==1) day = " 星期一"
if(today.getDay()==2) day = " 星期二"
if(today.getDay()==3) day = " 星期三"
if(today.getDay()==4) day = " 星期四"
if(today.getDay()==5) day = " 星期五"
if(today.getDay()==6) day = " 星期六"
document.fgColor = "000000";
date = "今天是:" + (today.getYear()) + "年" + (today.getMonth() + 1 ) + "月" + today.getDate() + "日" + day +"";
document.write(date);
// -->
</script>
<hr>
<div id="webjx"></div>
<hr>
<script>setInterval("webjx.innerHTML=new Date().toLocaleString()+' 星期'+'日一二三四五六'.charAt(new Date().getDay());",1000);
   </script>

<span id=nowDate></span>
<span id=nowTime></span>
<script><!--
var ns4up1 = (document.layers) ? 1 : 0;  // browser sniffer

var ie4up1 = (document.all&&(navigator.appVersion.indexOf("MSIE 4") == -1)) ? 1 : 0;

var ns6up1 = (document.getElementById&&!document.all) ? 1 : 0;

function nowclock() {
if (!ns4up1 && !ie4up1 && !ns6up1) return false;
var digital = new Date();
var hours = digital.getHours();
var minutes = digital.getMinutes();
var seconds = digital.getSeconds();
var day = digital.getDate();
var month = digital.getMonth() + 1;
var year = digital.getYear();
var amOrPm = "AM";
if (hours > 11) amOrPm = "PM";
if (hours > 12) hours = hours - 12;
if (hours == 0) hours = 12;
if (minutes < 10) minutes = "0" + minutes;
if (seconds < 10) seconds = "0" + seconds;
if (day < 10) day = "0" + day;
if (month < 10) month = "0" + month;
dispTime = hours + ":" + minutes + ":" + seconds + " " + amOrPm;
dispDate = year + "年" + month + "月" + day+ "日, " ;
if (ns4up1) {
document.layers.nowTime.document.write(dispTime);
document.layers.nowTime.document.close();
document.layers.nowDate.document.write(dispDate);
document.layers.nowDate.document.close();
} else if (ns6up1){
document.getElementById("nowTime").innerHTML = dispTime;
document.getElementById("nowDate").innerHTML = dispDate;
} else if (ie4up1){
nowTime.innerHTML = dispTime;
nowDate.innerHTML = dispDate;
} setTimeout("nowclock()", 1000);
} nowclock();
//-->
 </script>

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原文地址:https://www.cnblogs.com/kaiwanlin/p/3663741.html