jQuery 實現 點擊按鈕后倒計時效果,多用于實現發送手機驗證碼、郵箱驗證碼
<!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> <title></title> <script src="HTML/js/jquery-1.4.1.min.js" type="text/javascript"></script> <script type="text/javascript">
/*-------------------------------------------*/ var InterValObj; //timer變量,控制時間
var count = 5; //間隔函數,1秒執行 var curCount;//當前剩余秒數 var code = ""; //驗證碼 var codeLength = 6;//驗證碼長度 function sendMessage() { curCount = count; var dealType; //驗證方式 var uid=$("#uid").val();//用戶uid if ($("#phone").attr("checked") == true) { dealType = "phone"; } else { dealType = "email"; } //產生驗證碼 for (var i = 0; i < codeLength; i++) { code += parseInt(Math.random() * 9).toString(); } //設置button效果,開始計時 $("#btnSendCode").attr("disabled", "true"); $("#btnSendCode").val("請在" + curCount + "秒內輸入驗證碼"); InterValObj = window.setInterval(SetRemainTime, 1000); //啟動計時器,1秒執行一次 //向后臺發送處理數據 $.ajax({ type: "POST", //用POST方式傳輸 dataType: "text", //數據格式:JSON url: 'Login.ashx', //目標地址 data: "dealType=" + dealType +"&uid=" + uid + "&code=" + code, error: function (XMLHttpRequest, textStatus, errorThrown) { }, success: function (msg){ } }); } //timer處理函數 function SetRemainTime() { if (curCount == 0) {
window.clearInterval(InterValObj);//停止計時器 $("#btnSendCode").removeAttr("disabled");//啟用按鈕 $("#btnSendCode").val("重新發送驗證碼"); code = ""; //清除驗證碼。如果不清除,過時間后,輸入收到的驗證碼依然有效
} else { curCount--; $("#btnSendCode").val("請在" + curCount + "秒內輸入驗證碼"); } } </script> </head> <body> <input id="btnSendCode" type="button" value="發送驗證碼" onclick="sendMessage()" /></p> </body> </html></pre>