Jquery 驗證手機號碼



$("#btnSenderMessage").click(function(){
            var reg=/^1[3|4|5|7|8][0-9]\d{4,8}$/;
            var mobile = $("#<%=txtMobile.ClientID %>").val();

            if(mobile==null || mobile=="" || !reg.exec(mobile))
            {
                alert("聯繫電話有誤，請重新填寫:"+mobile);
            }
            else
            {
                alert("發送");
            }
        })