Posted in jQuery onNovember 09, 2017
本文实例讲述了js与jQuery实现的用户注册协议倒计时功能。分享给大家供大家参考,具体如下:
方法一:
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>3water.com 注册倒计时</title> <script type="text/javascript"> //用户有十秒钟的时间看协议,超过十秒钟,“同意”按钮将生效 var Seconds = 10; //计时器ID var setIntervalID; function ok() { var getid = document.getElementById("but"); if (Seconds <= 0) { getid.value="同意"; getid.disabled = false; //或者写成getid.disabled=""; 启用getid控件。 //停止计时器 clearInterval(setIntervalID); } else { getid.value = "请仔细阅读协议还剩下【" + Seconds + "】秒"; } Seconds--; } setIntervalID=setInterval("ok()", 1000); </script> </head> <body> <textarea cols="20" rows="8"></textarea><br /> <!--disabled="disabled" 默认submit表单是禁用的,也就是只读的,不能点击--> <input type="submit" id ="but" value="同意" disabled="disabled" /> </body> </html>
运行效果:
方法二:
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>3water.com 注册倒计时</title> <script src="jquery-1.7.2.min.js"></script> </head> <body> <form action="https://3water.com/" method="post" name="agree"> <input type="submit" class="button" value="" name="agreeb"> </form> </body> </html> <script> var secs = 5; var si; $(function () { $(".button").attr("disabled", "disabled"); $(".button").val("请认真查看<服务条款和声明>(" + secs + ")") si = setInterval(a, 1000); }) function a() { $(".button").val("请认真查看<服务条款和声明>(" + (secs-1) + ")"); if (secs == 0) { clearInterval(si); $(".button").val("我同意" ).removeAttr("disabled"); } secs--; } </script>
运行效果:
方法三:
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>3water.com 注册倒计时</title> </head> <body> <form action="https://3water.com/" method="post" name="agree"> <input type="submit" class="button" value="请认真查看<服务条款和声明> (30)" name="agreeb"> </form> </body> </html> <script> var secs = 30; document.agree.agreeb.disabled = true; for (var i = 1; i <= secs; i++) { window.setTimeout("update(" + i + ")", i * 1000); } function update(num) { if (num == secs) { document.agree.agreeb.value = " 我 同 意 "; document.agree.agreeb.disabled = false; } else { var printnr = secs - num; document.agree.agreeb.value = "请认真查看<服务条款和声明> (" + printnr + ")"; } } </script>
运行效果:
js与jQuery实现的用户注册协议倒计时功能实例【三种方法】
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