点击button时调用settime(60);
function settime(countdown)
{
if (countdown == 0)
{
document.getElementById('idSend').disabled = false;
document.getElementById('idSend').innerHTML = "获取验证码(60s)";
// alert(countdown);
}
else
{
// alert(countdown);
document.getElementById('idSend').disabled = true;
document.getElementById('idSend').innerHTML = "重新发送("+countdown+"s)";
countdown--;
setTimeout(function() {
settime(countdown); //1s timeout调用
},1000)
}
}