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[Java教程]jQuery发送验证码60秒倒计时


<!DOCTYPE html><html><head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" id="viewport" name="viewport"> <title></title><script src="http://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" id="btn" value="免费获取验证码" onclick="settime(this)" /> </body></html>