一个javascript脚本写的时钟

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<SCRIPT language=javascript>
<!--
pX=400;pY=200
obs = new Array(13)
function ob () {
for (i=0; i<13; i++) {
if (document.all) obs[i]=new Array (eval('ob'+i).style,-100,-100)
else obs[i] = new Array (eval('document.ob'+i),-100,-100)
}
}
function cl(a,b,c){
if (document.all) {
if (a!=0) b+=-1
eval('c'+a+'.style.pixelTop='+(pY+(c)))
eval('c'+a+'.style.pixelLeft='+(pX+(b)))
}
else{
if (a!=0) b+=10
eval('document.c'+a+'.top='+(pY+(c)))
eval('document.c'+a+'.left='+(pX+(b)))
}
if (document.all) c0.style.pixelLeft=26
}

function runClock() {
for (i=0; i<13; i++) {
obs[i][0].left=obs[i][1]+pX
obs[i][0].top=obs[i][2]+pY
}
}

var lastsec
function timer() {
time = new Date ()
sec = time.getSeconds()
if (sec!=lastsec) {

lastsec = sec
sec=Math.PI*sec/30
min=Math.PI*time.getMinutes()/30
hr =Math.PI*((time.getHours()*60)+time.getMinutes())/360
for (i=1;i<6;i++) {
   obs[i][1] = Math.sin(sec) * (44 - (i-1)*11)-16;
   if (document.layers)obs[i][1]+=10;
   obs[i][2] = -Math.cos(sec) * (44 - (i-1)*11)-27;
}
for (i=6;i<10;i++) {
   obs[i][1] = Math.sin(min) * (40 - (i-6)*10)-16;
   if (document.layers)obs[i][1]+=10;
   obs[i][2] = -Math.cos(min) * (40 - (i-6)*10)-27;
}
for (i=10;i<13;i++) {
   obs[i][1] = Math.sin(hr) * (37 - (i-10)*11)-16;
   if (document.layers)obs[i][1]+=10;
   obs[i][2] = -Math.cos(hr) * (37 - (i-10)*11)-27;
}
}

}
function setNum(){

cl (0,-67,-65);
cl (1,10,-51);
cl (2,28,-33);
cl (3,35,-8);
cl (4,28,17);
cl (5,10,35);
cl (6,-15,42);
cl (7,-40,35);
cl (8,-58,17);
cl (9,-65,-8);
cl (10,-58,-33);
cl (11,-40,-51);
cl (12,-16,-56);

}

file://-->

</SCRIPT>
</HEAD>