//30s后跳轉(zhuǎn)到目標(biāo)頁面
無url則為每30s刷新自身
<head>
<meta http-equiv="refresh" content="30,url=/''>
</head>
//定時(shí)器谓谦，倒計(jì)時(shí)-----
var int = 2
function countdown() {
document.getElementById("code").innerHTML = int + "秒后頁面跳轉(zhuǎn)";
int--;
if(int<0){
i=window.clearInterval(i)//結(jié)束
int = 2; //重新賦值
}
}
countdown();
setInterval(countdown,1000);
