本文实例讲述了javascript背景时钟实现方法。分享给大家供大家参考。具体如下：
以下是这个效果的全部代码。[最好从一个空页面开始]
<html><head><TITLE>背景时钟</TITLE> <script language=javaScript><!--// function clockon() {thistime= new Date()var hours=thistime.getHours()var minutes=thistime.getMinutes()var seconds=thistime.getSeconds()if (eval(hours) <10) {hours="0"+hours}if (eval(minutes) < 10) {minutes="0"+minutes}if (seconds < 10) {seconds="0"+seconds}thistime = hours+":"+minutes+":"+secondsif(document.all) {bgclocknoshade.innerHTML=thistimebgclockshade.innerHTML=thistime}if(document.layers) {document.bgclockshade.document.write('<div id="bgclockshade" style="position:absolute;visibility:visible;font-family:Verdana;color:FFAAAAA;font-size:120px;top:10px;left:152px">'+thistime+'</div>')document.bgclocknoshade.document.write('<div id="bgclocknoshade" style="position:absolute;visibility:visible;font-family:Verdana;color:DDDDDD;font-size:120px;top:10px;left:150px">'+thistime+'</div>')document.close()}var timer=setTimeout("clockon()",200)}//--></script><link rel="stylesheet" href="../style.css"></head><body onLoad="clockon()"><div id="bgclockshade" style="position:absolute;visibility:visible;font-family:Arial;color:FF8888;font-size:120px;top:102px;left:152px"></div><div id="bgclocknoshade" style="position:absolute;visibility:visible;font-family:Arial;color:DDDDDD;font-size:120px;top:100px;left:150px"></div><div id="mainbody" style="position:absolute; visibility:visible"></div></body></html>
说明：时钟显示的位置需要你修正TOP,LEFT参数来确定。TOP表示层距离显示器顶部的象素值，LEFT表示距离左侧的象素值。
希望本文所述对大家的javascript程序设计有所帮助。
