以下是源代码：

<div id=RStimeLayer style="position: absolute; left: 494; top: 101; width: 94; height: 19">_CLOCK_</div>

<script language="JavaScript1.2" >
RStimeFormat = "%h:%m:%s %a";
function RS_getTimeString(format) {
ptr = format.indexOf("%"); old = 0; time="";
while(ptr != -1) {
ch = format.charAt(ptr+1);
time += format.substring(old,ptr) + RS_getFormat(ch);
old = ptr+2;
ptr = format.indexOf("%",old);
}
time += format.substring(old,format.length);
return time;
}
function RS_setDigits(num, howmany) {
str = num.toString();
if (str.length >= howmany) return str;
for (i = str.length; i < howmany; i++) str = "0" + str;
return str;
}
function RS_getFormat(ch) {
now = new Date();
if(ch=='h') {
hour = now.getHours();
if(hour == 0) { hour = 12; }
else if (hour > 12) { hour -= 12; }
return hour; }
else if(ch=='H') { return now.getHours(); }
else if(ch=='m') { return RS_setDigits(now.getMinutes(),2); }
else if(ch=='s') { return RS_setDigits(now.getSeconds(),2); }
else if(ch=='d') { return now.getDate(); }
else if(ch=='D') {
return monArray[now.getMonth()]; }
else if(ch=='y') {
return ((now.getYear() <= 99) ? now.getYear() : RS_setDigits(now.getYear()-2000,2));}
else if(ch=='Y') {
return ((now.getYear() <= 99) ? "19"+now.getYear() : now.getYear());}
else if(ch=='a') {
if(now.getHours() == 0 || now.getHours() > 11) return "PM";
else return "AM"; }
else return "";
} function RS_changeText(id, str) {
if(document.layers) { // if Navigator 4.0+
with(document[id].document) {
open();
write(str);
close();
}
} else { // Internet Explorer 4.0+
document.all[id].innerHTML = str;
}
}

function RS_startClock() {
ClockID = setInterval("RS_changeText('RStimeLayer',RS_getTimeString(RStimeFormat))",500)
}

if(document.all||document.layers) RS_startClock();
</script>