JS之时间显示问题

function showTime(){//在页面上显示时间 电脑上的日期时间
var date = new Date();
document.getElementById("first").innerHTML = date.toLocaleString();
setTimeout("showTime()",1000);
}

function disptime() {//只获取时分秒
var time=new Date();
var hour=time.getHours();
var minute=time.getMinutes();
var second=time.getSeconds();
//   document.myform.myclock.href=hour+":"+minute+":"+second+" ";
document.getElementById("first").innerHTML = hour+":"+minute+":"+second;
var myTime=setTimeout("disptime()",1000);
}