JS倒计时60S实现

var flag = 1;
var i = 60;
function countDown() {
i = i - 1;
$("#authText").html(i+“秒后重新发送”);
if (i == 0) {
$("#authText").html(“重新发送”);
flag = 1;
i = 60;
return;
}
setTimeout(‘countDown()’,1000);
}