***时间日期***一个javascript时钟（指针式样的）
把下列代码加到网页的<body></body>标签之间 从google下载我的照片管理软件要完成此效果需要三个步骤
第一步：把如下代码加入到<head>区域中
<script language=javascript>
<!--
px=400;py=200
obs = new array(13)
function ob () {
for (i=0; i<13; i++) {
if (document.all) obs=new array (eval('ob'+i).style,-100,-100)
else obs = 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.left=obs+px
obs.top=obs+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 = math.sin(sec) * (44 - (i-1)*11)-16;
if (document.layers)obs+=10;
obs = -math.cos(sec) * (44 - (i-1)*11)-27;
}
for (i=6;i<10;i++) {
obs = math.sin(min) * (40 - (i-6)*10)-16;
if (document.layers)obs+=10;
obs = -math.cos(min) * (40 - (i-6)*10)-27;
}
for (i=10;i<13;i++) {
obs = math.sin(hr) * (37 - (i-10)*11)-16;
if (document.layers)obs+=10;
obs = -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);
}
//-->
</script>
第二步：把如下代码加入到<body>区域中
<div id="c0" style="position:absolute;right:6;top:33px; z-index:2;; left: 24px">
</div>
<div id="c1" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>1</b></div>
<div id="c2" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>2</b></div>
<div id="c3" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>3</b></div>
<div id="c4" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>4</b></div>
<div id="c5" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>5</b></div>
<div id="c6" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>6</b></div>
<div id="c7" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>7</b></div>
<div id="c8" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>8</b></div>
<div id="c9" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>9</b></div>
<div id="c10" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>10</b></div>
<div id="c11" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>11</b></div>
<div id="c12" style="position:absolute;left:20;top:-20; z-index:5;font-size:11px;"><b>12</b></div>
<div id="ob0" style="position:absolute;left:-20;top:-20;z-index:1"></div>
<div id="ob1" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob2" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob3" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob4" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob5" style="position:absolute;left:-19px;top:31px;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob6" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob7" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob8" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob9" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob10" style="position:absolute;left:-20;top:-20;z-index:6"> <font size="+3" color="#f30000"><b>.</b></font></div>
<div id="ob11" style="position:absolute;left:-20;top:-20;z-index:6"> <font size="+3" color="#f30000"><b>.</b></font></div>
<div id="ob12" style="position:absolute;left:-20;top:-20;z-index:6"> <font size="+3" color="#f30000"><b>.</b></font></div>
第三步：把“onload="ob(),setnum(),setinterval('timer()',100);setinterval('runclock()',100)"”加在<body>标记里
例如：<body onload="ob(),setnum(),setinterval('timer()',100);setinterval('runclock()',100)">
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