回车提交、连续点击、layer提示

1、回车提交

 /*******************回车键提交***********************************/
            document.onkeydown = function (e) {
                var ev = document.all ? window.event : e;
                if (ev.keyCode == 13) {
                    if ($(".ds_dialog").length > 0) {
                        return;
                    }
                    return CheckInput('txtUserName', 'txtCheckCode', 'lblError', 'hidErrCount');
                }
            }

2.连续点击、alert

/*******************登录提交***********************************/
        var isEnabledClick = 0; //防止连续点击
        function CheckInput(txtUserName, txtCheckCode, lblError, txtErrCount){
            var paramUserName = document.getElementById(txtUserName).value;
            var paramCheckCode = document.getElementById(txtCheckCode).value;
            var lang = document.getElementById("lang").value;
            if (paramUserName.length <= 0) {
                var errorMsg = lang == "en" ? "please input the User Name!" : "请输入用户名！";
                layer.alert(errorMsg, {
                    title: lang == "en" ? "Message reminding" : '消息提示',
                    btn: [lang == "en" ? "yes" : "确定"]
                });
                $("#txtUserName").focus();
                return;
            }

            var pwd = $("#txtPassWord").val();
            if (pwd.length <= 0) {
                var errorMsg = lang == "en" ? "please input the User password!" : "请输入密码！";
                layer.alert(errorMsg, {
                    title: lang == "en" ? "Message reminding" : '消息提示',
                    btn: [lang == "en" ? "yes" : "确定"]
                });
                $("#txtPassWord").focus();
                return;
            }
            ///////////////
            if (isEnabledClick == 0) {
                isEnabledClick = 1;
                $("#btnLogin").attr('disabled', "true");
            }
            else {
                var errorMsg = lang == "en" ? "Logging in, please later!" : "已经提交，请等待......";
                layer.alert(errorMsg, {
                    title: lang == "en" ? "Message reminding" : '消息提示',
                    btn: [lang == "en" ? "yes" : "确定"]
                });
                return;
            }
            setTimeout(function () {
                isEnabledClick = 0;
            }, 3000);