多个短信验证60s倒计时

function send_code(i) {

var tel_str = $("#per_tel" + i + "").val();

var myreg = /^(((13[0-9]{1})|(15[0-9]{1})|(17[0-9]{1})|(18[0-9]{1}))+\d{8})$/;

if (!myreg.test(tel_str)) {

alert("请填写手机号")

$("#per_tel" + i + "").focus();

return false;

}

settime(i, 60);

}

function settime(i, secodes) {

var countdown = secodes;

if (countdown == 0) {

$("#request_code" + i + "").attr('disabled', false);

$("#request_code" + i + "").text("获取验证码");

countdown = 60;

return;

} else {

$("#request_code" + i + "").attr('disabled', true);

$("#request_code" + i + "").text("重新发送(" + countdown + "秒后)");

countdown--;

}

setTimeout(function() {

settime(i, countdown)

}, 1000)

}