<!DOCTYPE html><html> ???<head> ???????<meta charset="UTF-8"> ???????<title></title> ???????<script type="text/javascript"> ???????????function init(){ ???????????????setInterval("changelunbo()",1000); ???????????} ???????????var i = 1; ???????????function changelunbo(){ ???????????????i++; ???????????????var imgE = document.getElementById("lunbo"); ???????????????imgE.src = "img/2."+i+".jpg"; ???????????????if(i == 4){ ???????????????????i = 0; ???????????????} ???????????} ???????</script> ???</head> ???<body onload="init()"> ???????<img src="img/2.1.jpg"/ id="lunbo"> ???</body></html>js实现简单的轮播效果
原文地址：https://www.cnblogs.com/wuleh/p/8527100.html