验证码倒计时的例子

先上效果图 代码如下： 1、HTML代码：

<div class="container" style="margin-top: 150px"> <div class="col-md-4"></div> <div class="panel panel-default col-md-6" style="padding-left: 0;padding-right: 0"> <div class="panel-heading">找回密码<span id="accountCheckMsg" style="color: #ff2a2c; float: right" ></span></div> <div class="panel-body"> <form class="form-horizontal" id="accountCheckForm" role="form" > <div class="form-group"> <label class="control-label col-md-3" for="userCd">用户CD:</label> <div class="col-md-9 form-inline"> <input class="form-control" type="text" id="userCd" name="userCd" placeholder="请输入用户CD" /> </div> </div> <div class="form-group"> <div class="col-md-3">&nbsp;&nbsp;&nbsp;</div> <div class="col-md-5"><input class="btn btn-info btn-block " type="button" id="sendCheckCode" value="发送验证码到邮箱"/></div> </div> <div class="form-group"> <label class="control-label col-md-3" for="checkCode">验证码:</label> <div class="col-md-9 form-inline"> <input class="form-control" type="text" id="checkCode" name="checkCode" placeholder="请输入验证码"/> </div> </div> <div class="form-group"> <div class="col-md-3">&nbsp;&nbsp;&nbsp;</div> <div class="col-md-5"><input class="btn btn-info btn-block " type="button" id="nextBtn" value="下一步"/></div> </div> </form> </div> </div> </div>

2、倒计时代码：

function settime(btn, waitTime) { if (waitTime == 0) { btn.removeAttribute("disabled"); btn.value="免费获取验证码"; return; } else { btn.setAttribute("disabled", true); btn.value="重新发送(" + waitTime + ")"; waitTime--; } setTimeout(function() { settime(btn, waitTime) },1000) }

3、单击事件代码：

$("#sendCheckCode").bind("click",function(){ settime(this, 30);//30代表倒计时30秒 })