html代码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>很简单的jquery表单短信验证码倒计时代码 </title> <script type="text/javascript" src="js/jquery.js"></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> </head> <body> <form> <label style="float:left;">验 证 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> <div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';"> <p>适用浏览器:IE8、360、FireFox、Chrome、Safari、Opera、傲游、搜狗、世界之窗.</p> </div> </body> </html>
js代码:
$(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) } }) })
截图: