<!DOCTYPE html> <html> <head> <script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script> <script type="text/javascript"> var countdown=60; function settime(obj) { if (countdown == 0) { obj.removeAttribute("disabled"); obj.value="免费获取验证码"; countdown = 60; return; } else { obj.setAttribute("disabled", true); obj.value="重新发送(" + countdown + ")"; countdown--; } setTimeout(function() { settime(obj) } ,1000) } </script> <body> <input type="button" value="免费获取验证码" /> </body> </html>
实践例子：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta content="width=device-width, initial-scale=1"> <title>抢占iPhone7专属预订名额</title> <link href="https://www.jb51.net/getiphone.css" /> </head> <body> <div> <img src="https://www.jb51.net/iponeImg/wenan.png" /> </div> <h1><span></span>上市时间同步发售<span></span><br />首批新苹果30个预订专属名额</h1> <form method="post" action="/wamei/activityController/save.htm"> <label> <span><img src="https://www.jb51.net/iponeImg/yonghu.png" /></span> <i></i> <input type="text" placeholder="请输入您的真实姓名" datatype="*1-20" errormsg="姓名最多20个中英文字符！" nullmsg="请输入您的真实姓名！" /> </label> <label> <span><img src="https://www.jb51.net/iponeImg/dianhua.png" /></span> <i></i> <input type="text" placeholder="请输入您的手机号码" datatype="*" errormsg="请输入您的手机号码！" nullmsg="请输入您的手机号码！" /> </label> <label> <span><img src="https://www.jb51.net/iponeImg/yanzhengma.png" /></span> <i></i> <input type="text" placeholder="验证码" datatype="*" errormsg="请输入验证码！" nullmsg="请输入验证码！" /> <a mark="1" >获取验证码</a> </label> <label> <input type="submit" value="提交抢占名额" /> </label> <label> <a href="https://www.jb51.net/wamei/pages/activity/details.html">查看活动详情</a> </label> </form> <div> <span></span> <img src="https://www.jb51.net/iponeImg/logo.png" /> <span></span> </div> <div> <div> <a></a> <p><img src="https://www.jb51.net/iponeImg/chenggong.png" />恭喜提交成功</p> <p>分享一下，安抚激动的心</p> </div> </div> </body> </html> <!-- scripts --> <script src="https://www.jb51.net/wamei/pages/js/jquery.min.js"></script> <script src="https://www.jb51.net/wamei/pages/js/jquery.form.js"></script> <script src="https://www.jb51.net/wamei/pages/js/bootstrap.min.js"></script> <script src="https://www.jb51.net/wamei/pages/js/Validform_v5.3.2.js"></script> <script type="text/javascript"> $(function(){ //提交表单 $("#activityForm").Validform({ btnSubmit:"#confirm", tiptype:function(msg){ if(msg != '' && msg!='通过信息验证！'){ alert(msg); } }, tipSweep:true, beforeSubmit:function(){ saveForm(); return false; } }); }); //只允许在APP内打开 function isMobile(){ var u = navigator.userAgent; var mobileFlag = u.indexOf('type/tfbrowser') > -1; return mobileFlag; } //手机号码验证 $("#mobilePhone").blur(function(){ var mobilePhone =$("#mobilePhone").val(); var myreg = /^(((13[0-9]{1})|(14[0-9]{1})|(17[0]{1})|(15[0-3]{1})|(15[5-9]{1})|(18[0-9]{1}))+\d{8})$/; if(mobilePhone){ if(!myreg.test(mobilePhone)){ alert("请输入有效的手机号码！"); $("#mobilePhone").val(""); return ; } } }); //发送短信验证码 $("#num").click(function(){ var mobilePhone =$("#mobilePhone").val(); var url="/wamei/activityController/sendValidCode.htm"; if(!mobilePhone){ alert("请输入您的手机号码！"); return ; } var mark = $("#num").attr("mark"); if("1"==mark){ settime(this); $.post(url,{mobilePhone:mobilePhone},function(html){ var data = eval("("+html+")"); if(data && data.statusCode==1){ console.log("send success!"); alert("短信验证码已发送，请查收！"); }else{ alert(data.msg); } }); } }); //提交form表单 function saveForm(){ $("#activityForm").ajaxSubmit({ //data: {'columnStr':columnStr}, type: 'post', async: false, success: function($data) { var data = eval("("+$data+")"); if(data && data.statusCode==1){ $("#success").show(); }else{ alert(data.msg); $("#mobilePhone").val(""); } } }); } $(".close").click(function(){ $("#success").hide(); window.location.reload(); }) //短信后倒计时 var countdown=60; function settime(obj) { if (countdown == 0) { $(obj).attr("disabled",false); $(obj).attr("mark","1"); $(obj).html("获取验证码"); countdown = 60; return; } else { $(obj).attr("disabled", true); $(obj).attr("mark","0"); $(obj).html("重新发送(" + countdown + ")"); countdown--; } setTimeout(function() { settime(obj) } ,1000) } // $("#confirm").click(function(){ // $("#success").show(); // }) </script>
PS：这里再为大家提供2款非常方便的正则表达式工具供大家参考使用：
JavaScript正则表达式在线测试工具：