Can I Pass My Textbox Control From Javascript To Webmethods

<script type="text/javascript">

       function Enterkey1() {
      var UserId = document.getElementById("<%=TxtUserid.ClientID%>").value;
      var UserName = document.getElementById("<%=TxtUserName.ClientID%>").value;
      var Password = document.getElementById("<%=TxtPassword.ClientID%>").value;
      var ConPassword = document.getElementById("<%=TxtConPassword.ClientID%>").value;
           var EmailId = document.getElementById("<%=TxtEmailId.ClientID%>").value;
           var Country = document.getElementById("<%=TxtCountry.ClientID%>").value;
           var date = '0';

                   PageMethods.password(UserId,UserName,Password,ConPassword,EmailId,Country,date,onSuccess);
               return false;
           }

[System.Web.Services.WebMethod]
        public static string password(string UserId, string UserName, string Password, string ConPassword, string EmailId, string Country, string date)
        {
            string flag = "";
            date = DateTime.Now.ToString("dd/MM/yyyy");
            try
            {
               if (Password.Trim().Replace(" ", "") != ConPassword.Trim().Replace(" ", ""))
                {
                    flag = "false1";
                    //Password.Text = "";
                    return flag;
                }

                else
                {
                    MyFunctions Functions = new MyFunctions();
                    Functions.insertLogin("insert into UserLogin values('" + UserId.Trim().Replace(" ", "") + "','" + UserName.Trim().Replace(" ", "") + "','" + Password.Trim().Replace(" ", "") + "','" + EmailId.Trim().Replace(" ", "") + "','" + Country.Trim().Replace(" ", "") + "','" + date.Trim().Replace(" ", "") + "')");
                    flag = "true";
                    return flag;
                }
            }

            catch (Exception ex)
            {
               return ex.Message.ToString();
            }
        }