자바스크립트의 지연문이란 무엇인가요?

setTimeout(function() { remind(); }, 5000);  //5秒后将会调用执行remind()函数

var interval;
interval = setInterval(function() { remind() }, 5000);  //5秒循环调用执行remind()函数
clearInterval(interval);   //清除延时程序

var timer;
if (login.state !== undefined) {
    if (login.state) {
        var fen = login.info.fen;
        var xianbey = login.info.xianBey
        clearTimeout(timer);    //清除延时程序
    }
}
else {
    timer = setTimeout(arguments.callee, 1);    //延时循环执行自己
}