Javascript 获取年月日 星期几 时间

12年前
          <script language="JavaScript" type="text/javascript">                   <!--                  calendar = new Date();                  day = calendar.getDay();                  month = calendar.getMonth();                  date = calendar.getDate();                  year = calendar.getYear();                  if (year< 100) year = 1900 + year;                  cent = parseInt(year/100);                  g = year % 19;                  k = parseInt((cent - 17)/25);                  i = (cent - parseInt(cent/4) - parseInt((cent - k)/3) + 19*g + 15) % 30;                  i = i - parseInt(i/28)*(1 - parseInt(i/28)*parseInt(29/(i+1))*parseInt((21-g)/11));                  j = (year + parseInt(year/4) + i + 2 - cent + parseInt(cent/4)) % 7;                  l = i - j;                  emonth = 3 + parseInt((l + 40)/44);                   edate = l + 28 - 31*parseInt((emonth/4));                  emonth--;                  var dayname = new Array ("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");                  var monthname =                  new Array ("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月" );                  document.write(year +"年");                  document.write(monthname[month]);                  document.write(date + "日"+" ");                  document.write(dayname[day]);                  //-->              </script>              <script language="JavaScript" type="text/javascript">                   <!--                  document.write("<span id='clock'></span>");                   var now,hours,minutes,seconds,timeValue;                   function showtime(){                  now = new Date();                   hours = now.getHours();                   minutes = now.getMinutes();                   seconds = now.getSeconds();                   timeValue = (hours >= 12) ? " 下午 " : " 上午 ";                   timeValue += ((hours > 12) ? hours - 12 : hours) + "点";                   timeValue += ((minutes <10)?"0":"") + minutes+"分";                   timeValue += ((seconds <10)?"0":"") + seconds+"秒";                   clock.innerHTML = timeValue;                   setTimeout("showtime()",100);                   }                   showtime();                   //-->               </script>