location.href='url';
时间结束后加一行跳转代码
var leftsecond=parseInt((y2k.getTime()-now.getTime())/1000);
if(leftsecond==0) document.location.href="..网站地址..";
1、延时方法
var tmid = window.setTimeout(“方法名或方法”, “延时”);
2、页面跳转
window.location.href="jb51.jsp?backurl="+window.location.href;