js显示日期和时间

显示 年月日+星期

<script type="text/javascript">

function showDate()

{        

    var day="";        

    var month="";        

    var ampm="";        

    var ampmhour="";        

    var myweekday="";        

    var year="";        

    mydate=new Date();        

    myweekday=mydate.getDay();        

    mymonth=mydate.getMonth()+1;        

    myday= mydate.getDate();        

    myyear= mydate.getYear();        

    year=(myyear > 200) ? myyear : 1900 + myyear;        

    if(myweekday == 0)         

        weekday=" 星期日";        

    else if(myweekday == 1)        

        weekday=" 星期一";        

    else if(myweekday == 2)        

        weekday=" 星期二";        

    else if(myweekday == 3)        

        weekday=" 星期三";        

    else if(myweekday == 4)         

        weekday=" 星期四";        

    else if(myweekday == 5)        

        weekday=" 星期五";       

    else if(myweekday == 6)        

        weekday=" 星期六";        

    document.write(year+"年"+mymonth+"月"+myday+"日"+weekday);

}

showDate();

</script>

或

<script type="text/javascript">

today=new Date();

function initArray()

{

   this.length=initArray.arguments.length

   for(var i=0;i<this.length;i++)

   {

     this[i+1]=initArray.arguments[i];

   }

}

var d=new initArray(" 星期日"," 星期一"," 星期二"," 星期三"," 星期四"," 星期五"," 星期六");

document.write(today.getYear(),"年","",today.getMonth()+1,"月",today.getDate(),"日",d[today.getDay()+1]);

</script>

显示当前日期时间[不断变化]

<div id="Clock" align="center" style="font-size: 12px; color:#000000"></div> 

<script>

function tick() {

var hours, minutes, seconds, xfile;

var intHours, intMinutes, intSeconds;

var today, theday;

today = new Date();

function initArray(){

this.length=initArray.arguments.length

for(var i=0;i<this.length;i++)

this[i+1]=initArray.arguments[i] }

var d=new initArray(

"星期日",

"星期一",

"星期二",

"星期三",

"星期四",

"星期五",

"星期六");

theday = today.getYear()+"年" + [today.getMonth()+1]+"月" +today.getDate() + d[today.getDay()+1];

intHours = today.getHours();

intMinutes = today.getMinutes();

intSeconds = today.getSeconds();

if (intHours == 0) {

hours = "12:";

xfile = "午夜";

} else if (intHours < 12) {

hours = intHours+":";

xfile = "上午";

} else if (intHours == 12) {

hours = "12:";

xfile = "正午";

} else {

intHours = intHours - 12

hours = intHours + ":";

xfile = "下午";

}

if (intMinutes < 10) {

minutes = "0"+intMinutes+":";

} else {

minutes = intMinutes+":";

}

if (intSeconds < 10) {

seconds = "0"+intSeconds+" ";

} else {

seconds = intSeconds+" ";

}

timeString = theday+xfile+hours+minutes+seconds;

Clock.innerHTML = timeString;

window.setTimeout("tick();", 100);

}

window.onload = tick;

</script>

或者

<script language="JavaScript" type="text/javascript">

calendar = new Date();

day = calendar.getDay();

month = calendar.getMonth();

date = calendar.getDate();

year = calendar.getYear();

if (year< 100) year = 1900 + year;

cent = parseInt(year/100);

g = year % 19;

k = parseInt((cent - 17)/25);

i = (cent - parseInt(cent/4) - parseInt((cent - k)/3) + 19*g + 15) % 30;

i = i - parseInt(i/28)*(1 - parseInt(i/28)*parseInt(29/(i+1))*parseInt((21-g)/11));

j = (year + parseInt(year/4) + i + 2 - cent + parseInt(cent/4)) % 7;

l = i - j;

emonth = 3 + parseInt((l + 40)/44);

edate = l + 28 - 31*parseInt((emonth/4));

emonth--;

var dayname = new Array ("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");

var monthname =

new Array ("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月" );

document.write(year +"年");

document.write(monthname[month]);

document.write(date + "日"+" ");

document.write(dayname[day]);

document.write("<span id='clock'></span>");

var now,hours,minutes,seconds,timeValue;

function showtime(){

now = new Date();

hours = now.getHours();

minutes = now.getMinutes();

seconds = now.getSeconds();

timeValue = (hours >= 12) ? " 下午" : " 上午";

timeValue += ((hours > 12) ? hours - 12 : hours) + "点";

timeValue += ((minutes <10)?"0":"") + minutes+"分";

timeValue += ((seconds <10)?"0":"") + seconds+"秒";

clock.innerHTML = timeValue;

setTimeout("showtime()",100);

}

showtime();

</script>

精简的代码

<script language="javascript" type="text/javascript"> 

        setInterval("timer.innerHTML=new Date().toLocaleString()+'&nbsp;&nbsp;星期'+'日一二三四五六'.charAt(new Date().getDay());",1000);      

</script>

<span id="timer"></span>