<!DOCTYPE doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title> Document </title> <style> #div1 {background: black;color: white;font-size: 50} </style> <script> window.onload =function(){ var od =document.getElementById('div1') var ai =od.getElementsByTagName('img') function tick(){ var data1 =new Date() var str1 =toDou(data1.getHours())+toDou(data1.getMinutes())+toDou(data1.getSeconds()) for(var i =0;i<ai.length;i++){ ai[i].src ='img/'+str1[i]+'.png' } } setInterval(tick,1000) tick() } function toDou(n){ if (n<10){ return '0'+n }else{ return ''+n } } </script> </meta> </head> <body> <div id="div1"> <img alt="" src="img/1.png"> <img alt="" src="img/2.png"> : <img alt="" src="img/3.png"> <img alt="" src="img/4.png"> : <img alt="" src="img/5.png"> <img alt="" src="img/6.png"> </img> </img> </img> </img> </img> </img> </div> </body> </html>