js 当前时间刷新

<p>每隔1秒钟，打印当前时间</p>
 
<div id="time"></div>
 
<script>
 
function printTime(){
  var d = new Date();
  var h= d.getHours();
  var m= d.getMinutes();
  var s= d.getSeconds();
  document.getElementById("time").innerHTML= h+":"+m+":"+s;
 
}
 
var t = setInterval(printTime,);
 
</script>
 
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