JS实现用户注册时获取短信验证码和倒计时功能

<div class="user-form">
<form action="{{ path('zm_member_register') }}" method="post">
<div class="form-list">
<label class="register-label">手机号码</label>
<input class="regphone input-register" type="text" name="phone" placeholder="请输入手机号码" />
</div>
<div class="form-list">
<label class="register-label">验证码</label>
<input class="input-short" type="text" name="sms_salt" placeholder="请输短信验证码" />
<input class="input-code" id="btn" type="button" value="发送验证码" />
</div>
<input style="margin-top: 60px;" type="submit" class="registerSubmit form-sumbit" value="提交" />
</form>
</div>

<script type="text/javascript">
//倒计时60秒
var wait=60;
function time(o) {
if (wait == 0) {
o.removeAttribute("disabled");
o.value="获取动态码";
wait = 60;
} else {
o.setAttribute("disabled", true);
o.value="重新发送(" + wait + ")";
wait--;
setTimeout(function() {
time(o)
}, 1000)
}
}
$('.input-code').click(function() {
var phone = $('.regphone').val();
$.ajax({
type: 'post',
url: "{{ path('zm_member_get_salt') }}",
data: {
phone: phone,
type: 1
},
dataType: 'json',
success: function (result) {
if (result.flag == 1) {
// alert('成功');
time(btn);
} else {
alert(result.content);
}
}
});
});
</script>