html中使用js来获取本地系统时间

<div id="名称">
<script language=Javascript>
var now=new Date()
document.write(1900+now.getYear()+"-"+(now.getMonth()+1)+"-"+now.getDate()+" "+now.getHours()+":"+now.getMinutes()+":"+now.getSeconds())
</script>
</div>