js输出当前系统时间

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>当前系统时间</title></head><body><div class="content1">  <div id="show">显示时间的位置</div></div></body></html>

<script language="javascript" type="text/javascript">window.onload = function(){showTime();}function checkTime(i){if (i<10) {i="0" + i;}return i;}function showTime(){var now=new Date();var year=now.getFullYear();var month=now.getMonth()+1;var day=now.getDate();var h=now.getHours();var m=now.getMinutes();var s=now.getSeconds();m=checkTime(m);s=checkTime(s);var weekday=new Array(7);weekday[0]="星期日";weekday[1]="星期一";weekday[2]="星期二";weekday[3]="星期三";weekday[4]="星期四";weekday[5]="星期五";weekday[6]="星期六";document.getElementById("show").innerHTML=""+year+"年"+month+"月"+day+"日 "+weekday[now.getDay()]+h+":"+m+":"+s;t=setTimeout('showTime()',500)}</script>

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