时钟

var oHour=document.querySelector('.hour');
var oMintue=document.querySelector('.mintue');
var oSecond=document.querySelector('.second');
var date=new Date();
hour=date.getHours();
mintue=date.getMinutes();
second=date.getSeconds();
oHour.innerText=hour;
oMintue.innerText=mintue;
oSecond.innerText=second;



setInterval(function() {
    var date=new Date();
    hour=date.getHours();

    mintue=date.getMinutes();
    second=date.getSeconds();
    oHour.innerText=hour;
    oMintue.innerText=mintue;
    oSecond.innerText=second;

  },1000) 

　简易时钟