Insert data to array using jQuery in ASP.Net

dear sir i Have An array value and send to an page for inserting on perticuler person ...

$(document).ready(function(){
var a=[];
var arr="";
$(".get_id").click(function(){
if($("#ctl00_ContentPlaceHolder1_add_hidden").val()!=null && $("#ctl00_ContentPlaceHolder1_add_hidden").val()!="")
{
     alert("hello");

    var clg_id=$(this).siblings(".clg_id").val();
    var a_index=a.indexOf($(this).siblings(".clg_id").val());
    alert(a_index);
    if(a_index<0)
    {
    a.push(clg_id); 
    alert(a);

$('#Login_Register_btn1').click(function(){
           $.ajax({
            var dd=a;
                type: "POST",
                url: "update_add_college.aspx/UpdateCustomer",
                data: "{'clgid': '" + dd + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (response) {
                    alert("User has been added successfully.");
                    window.location.reload();
                }
            });
            return false;
        });
             
    }
else
{
}

working alert(a) values are 15,25,30,35 of clgid 

update page codding 

 public class User
    {
    public string wid { get; set; }
    public string usid { get; set; }
    }


    [System.Web.Script.Services.ScriptMethod()]
    [System.Web.Services.WebMethod]
    public static void UpdateCustomer(string clgid,string usid)
    {
       
        usid = HttpContext.Current.Response.Cookies["user_login"].Value;
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["easyshikshaConnectionString"].ConnectionString);
        con.Open();
        SqlCommand cmd1 = new SqlCommand("Update user_Information set wishtlist_clg=@wid where user_id=@usid");
                cmd1.Parameters.AddWithValue("@wid", clgid);
                cmd1.Parameters.AddWithValue("@usid", usid);
                cmd1.CommandType = CommandType.Text;
                int count = cmd1.ExecuteNonQuery(); 
                con.Close(); 
               
      
    }
    

user id get from cookies ... if user login here..

but when we click on button then any response and not alert come from there ..

i want to insert this array value in database where user id is current cookies on page ....

please resolve this 

i tried

http://www.aspsnippets.com/Articles/Insert-Update-Data-to-Database-with-jQuery-AJAX-and-WebMethod-in-ASPNet.aspx

http://www.aspsnippets.com/Articles/Save-Form-Data-to-Database-with-jQuery-AJAX-in-ASPNet.aspx