javascript定时器

setInterval方式

var num = 0;var max = 5;function fur(){    var div$ = document.getElementById("div1");    num++;    div$.innerHTML+=num;    if(num == max){        clearInterval(id);        alert("时间到了");    }}var id = setInterval(fur,1000);//返回的是一个id，clearInterval可以通过id来关闭

• setTimeout 方式

var num = 0;var max = 5;function fur(){    var div$ = document.getElementById("div1");    num++;    div$.innerHTML+=num;    if(num == max){        alert("时间到了");    }else{        setTimeout(fur,1000);    }}setTimeout(fur,1000);