用JavaScript制作的特色时钟

2012-11-06 来源：网络

【实例名称】

用JavaScript制作的特色时钟

【实例描述】

JavaScript的功能非常强大，可结合CSS实现日历、时钟等。本例学习如何实现用纯脚本制作的时钟。

【实例代码】

 
 <html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>无标题页-学无忧（www.xue51.com）</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)
 }
}
//设置时钟中各时间点的位置
function cl(a,b,c)
{
   //判断浏览器格式
 if (document.all) {
    //IE格式
  if (a!=0) b+=-1
  eval('c'+a+'.style.pixelTop='+(pY+(c)))  //y坐标
  eval('c'+a+'.style.pixelLeft='+(pX+(b))) //x坐标
  }
else{
   //其他浏览器格式
 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
}
//设置时针、分针、秒针的显示位置
function runClock() 
{
 for (i=0; i<13; i++) {
  obs[i][0].left=obs[i][1]+pX
  obs[i][0].top=obs[i][2]+pY
 }
}
//设置时、分、秒的显示效果
var lastsec;
function timer() 
{
 time = new Date ()
 sec = time.getSeconds()    //获取当前时间的秒分
 if (sec!=lastsec) {
  lastsec = sec
  sec=Math.PI*sec/30     //秒
  min=Math.PI*time.getMinutes()/30  //分
  hr =Math.PI*((time.getHours()*60)+time.getMinutes())/360 //时
  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;
  }
 }
}
//设置钟点
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>
</head>
<body bgcolor="#ffffff" onLoad="ob(),setNum(),setInterval('timer()',100);setInterval('runClock()',100)">
右下角是显示的时钟效果
<div id="c0" style="position:absolute;right:6;top:6; z-index:2;"> 
   </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:-20;top:-20;
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>
</body>
</html>
 
 
【运行效果】

用JavaScript制作的特色时钟运行效果