母版页里面的js验证

   <script type="text/javascript">                        $(function () {                            var CreateUserButton = $("#<%=CreateUserButton.ClientID %>");                            CreateUserButton.click(function () {                                var form = $("form");                                form.submit(function () {                                   return Submit();                                });                            });                        });                        function Submit() {                            var username = document.getElementById("<%=UserName.ClientID%>");                            var userpwd = document.getElementById("<%=Password.ClientID %>");                            var useremail = document.getElementById("<%=Email.ClientID %>");                            var userpwd2 = document.getElementById("<%=ConfirmPassword.ClientID %>");                            var UserNameMesg = document.getElementById("UserNameMesg");                            var EmailMesg = document.getElementById("EmailMesg");                            var PasswordMesg = document.getElementById("PasswordMesg");                            var ConfirmPasswordMesg = document.getElementById("ConfirmPasswordMesg");                             if (isNull(username.value)) { username.style.background = "#ea5448";UserNameMesg.innerHTML = "用户名不能为空"; return false; }                            else { username.style.background = "white"; UserNameMesg.innerHTML = ""; }                            if (!isUserName(username.value)) { UserNameMesg.innerHTML = "用户名不合法"; return false; }                            else { UserNameMesg.innerHTML = ""; }                            if (isNull(userpwd.value)) { userpwd.style.background = "#ea5448"; PasswordMesg.innerHTML = "密码不能为空"; return false; }                            else { userpwd.style.background = "white";PasswordMesg.innerHTML = ""; }                            if (isNull(useremail.value)) { useremail.style.background = "#ea5448";EmailMesg.innerHTML="用户邮箱不能为空"; return false; }                            else { useremail.style.background = "white"; EmailMesg.innerHTML = ""; }                            if (!isEmail(useremail.value)) { EmailMesg.innerHTML = "电子邮箱格式不合法"; return false; }                            else { EmailMesg.innerHTML=""}                            if (isNull(userpwd2.value)) { userpwd2.style.background = "#ea5448"; ConfirmPasswordMesg.innerHTML = "确认密码不能为空"; return false; }                            else { userpwd2.style.background = "white";ConfirmPasswordMesg.innerHTML = ""; }                            if (userpwd.value.length < 6) { PasswordMesg.innerHTML = "密码不能少于六位"; return false; }                            else {PasswordMesg.innerHTML = "";}                            if (userpwd.value != userpwd2.value) { ConfirmPasswordMesg.innerHTML = "两次密码输入不一致"; return false; }                            else {ConfirmPasswordMesg.innerHTML = ""; }                                                      return true;                        }                    </script>