网页上JS显示倒计时

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<b><font color="blue">奥运会开幕还有:</font>
<font color="red"><span id="timeDate">载入天数...</span><span id="times">载入秒数...</span>
<script type="text/javascript"><!--
var now = new Date();
function createtime(){

var grt= new Date("8/08/2008 20:00:00");

now.setTime(now.getTime()+250);
days = (grt - now) / 1000 / 60 / 60 / 24;
dnum = Math.floor(days);
hours = (grt - now) / 1000 / 60 / 60 - (24 * dnum);
hnum = Math.floor(hours);
if(String(hnum).length ==1 ){hnum = "0" + hnum;}
minutes = (grt - now) / 1000 /60 - (24 * 60 * dnum) - (60 * hnum);
mnum = Math.floor(minutes);
if(String(mnum).length ==1 ){mnum = "0" + mnum;}
seconds = (grt - now) / 1000 - (24 * 60 * 60 * dnum) - (60 * 60 * hnum) - (60 * mnum);
snum = Math.round(seconds);
if(String(snum).length ==1 ){snum = "0" + snum;}

document.getElementById("timeDate").innerHTML = dnum+"天";
document.getElementById("times").innerHTML = hnum + ":" + mnum + ":" + snum;
}

setInterval("createtime()",250);
// --></script>
</font></b>

用JS在你的网页上显示当前时间

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<font color="red"><b>
<script language="JavaScript">
<!--
tmpDate = new Date();
date = tmpDate.getDate();
month= tmpDate.getMonth() + 1 ;
myyear= tmpDate.getYear();
year=(myyear > 200) ? myyear : 1900 + myyear;

document.write(year);
document.write("年");
document.write(month);
document.write("月");
document.write(date);
document.write("日 ");

myArray=new Array(6);
myArray[0]="星期日"
myArray[1]="星期一"
myArray[2]="星期二"
myArray[3]="星期三"
myArray[4]="星期四"
myArray[5]="星期五"
myArray[6]="星期六"
weekday=tmpDate.getDay();
if (weekday==0 | weekday==6)
{
document.write(myArray[weekday])
}
else
{document.write(myArray[weekday])
};

hours = tmpDate.getHours();
minutes = tmpDate.getMinutes();
seconds = tmpDate.getSeconds();
times = "<font color=orange>" + ((hours >24) ? hours -12 :hours); times += ((minutes < 10) ? "<blink>:</blink>0" : "<blink>:</blink>") + minutes+"</font>";
times += (hours >= 12) ? "<b>PM</b>" : "<b>AM</b>";
document.write(times);
// -->
</script>
</b></font>