短信验证码

1.验证码倒计时

方法一：

<input type="button" id="btn" value="免费获取验证码" /> 




<script>




var wait=60;




function time(o) {





if (wait == 0) {




o.removeAttribute("disabled"); 




o.value="免费获取验证码";




wait = 60;




} else { 




o.setAttribute("disabled", true);




o.value="重新发送(" + wait + ")"; 




wait--;





setTimeout(function() { 




time(o)

 

},1000)




}




}

document.getElementById("btn").onclick=function(){time(this);} 





</script>

方法二：

<input type="button" style="height:32px;width:120px;" value="点击发送验证码" οnclick="sendCode(this)" />
<script type="text/javascript">
var clock = '';
var nums = 10;
var btn;
function sendCode(thisBtn)
{
btn = thisBtn;
btn.disabled = true; //将按钮置为不可点击
btn.value = nums+'秒后可重新获取';
clock = setInterval(doLoop, 1000); //一秒执行一次
}
function doLoop()
{
nums--;
if(nums > 0){
btn.value = nums+'秒后可重新获取';
}else{
clearInterval(clock); //清除js定时器
btn.disabled = false;
btn.value = '重新发送验证码';
nums = 10; //重置时间
}
}
</script>

 JS请求验证码如下：

 $.ajax({

      type: "GET",

      url: "../Ajax/smsrandcodetest.ashx?phone=" + phone.val() + "

&smsCodeRand=" + num,

      success: function(result) {

          if (result == "Y") {

             alert("验证码已发送至您输入的手机号！有效期5分钟");

             

RemainTime();

         

}
          else {
              alert("验证码获取失败！请重新获取");
          }
       },
       error: function() { alert("error"); }
  });

//获取6位随机验证码

function random() {

    var num = "";

    for (i = 0; i < 6; i++) {

        num = num + Math.floor(Math.random() * 10);
    }
    return num;
}

//验证码有效期倒计时

function RemainTime() {

    var iSecond;

    var sSecond = "", sTime = "";

    if (iTime >= 0) {

        iSecond = parseInt(iTime % 300);

        if (iSecond >= 0) {

            sSecond = iTime + "秒";
        }

        sTime = "<span style='color:darkorange;font-size:13px;'>"

+ sSecond + "</span>";

        if (iTime == 0) {

            clearTimeout(Account);

            sTime = "<span style='color:red;font-size:12px;'>验证

码已过期</span>";
        }

        else {
            Account = setTimeout("RemainTime()", 1000);
        }
        iTime = iTime - 1;
    }
    $("#endtime").html(sTime);
}