javascript显示实时时间

<html>
 <script language=Javascript> 
  function time(){
    //获得显示时间的div
    t_div = document.getElementById('showtime');
   var now=new Date()
    //替换div内容 
   t_div.innerHTML = "现在是"+now.getYear()
    +"年"+(now.getMonth()+1)+"月"+now.getDate()
    +"日"+now.getHours()+"时"+now.getMinutes()
    +"分"+now.getSeconds()+"秒";
    //等待一秒钟后调用time方法,由于settimeout在time方法内,所以可以无限调用
   setTimeout(time,1000);
  }

</script>
  </head>
  
  <body  onload="time()">
    <div id="showtime"></div>
  </body>

</html>

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