利用js动态显示实时时间

<p id="time"></p>

<script>
function showtime(){
now=new date();
year=now.getFullYear();
month=now.getdMonth()+1;
date=now.getDate();
document.getElementById("time").innerText=year+"年"+month+"月"+date+" "+now.toLocalTimeString();
}
setInterval("showtime()",1000);
</script>