点击获取短信验证码JQ倒计时代码

<meta charset="UTF-8" />

<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">[/html][js]
$(function  () {
        //获取短信验证码
        var validCode=true;
        $(".msgs").click (function  () {
                var time=30;
                var code=$(this);
                if (validCode) {
                        validCode=false;
                        code.addClass("msgs1");
                var t=setInterval(function  () {
                        time--;
                        code.html(time+"秒");
                        if (time==0) {
                                clearInterval(t);
                        code.html("重新获取");
                                validCode=true;
                        code.removeClass("msgs1");

                        }
                },1000)
                }
        })
})[/js][code]
</script>

<style type="text/css">

form{margin:200px auto;width:500px;}
label{font-size:14px;color:#555;line-height:40px;margin-right:10px;}
input{width:212px;height:38px;border-style:none;padding:0 4px;border:1px solid #C8C8C8;margin-right:10px;outline:none;}
.msgs{display:inline-block;width:104px;color:#fff;font-size:12px;border:1px solid #0697DA;text-align:center;height:30px;line-height:30px;background:#0697DA;cursor:pointer;}
form .msgs1{background:#E6E6E6;color:#818080;border:1px solid #CCCCCC;}

</style>



<form>
        <label style="float:left;">验&nbsp;&nbsp;证&nbsp;码</label>
        <input type="text" class="c_code_msg" style="margin-right: 10px;">
        <span class="msgs">获取短信验证码</span>
</form>