Autocomplete textbox using jquery in asp net

For autocomplete textbox i am using asp.net GenericHandler.ashx, jquery, StoreProcedure.


GenericHandler.ashx
------------------------
public void ProcessRequest(HttpContext context)
{
string term = context.Request["term"] ?? "";
List<string> listCustomerName = new List<string>();

string cs = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;

using (SqlConnection conn = new SqlConnection(cs))
{
SqlCommand cmd = new SqlCommand("searchCustomerDetails",conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter()
{
ParameterName ="@term",
Value =term
});
conn.Open();
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
listCustomerName.Add(rdr["CustomerName"].ToString());
}
}
JavaScriptSerializer js = new JavaScriptSerializer();
context.Response.Write(js.Serialize(listCustomerName));
}

JQuery
--------
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<link href="SearchCustomer/jquery-ui.css" rel="stylesheet" />
<script src="SearchCustomer/jquery-ui.js"></script>

<script type="text/javascript">
$(document).ready(function () {
$('#txtName').autocomplete({
source: 'CustomerHandler.ashx'
});
});

</script>

Store Procedure
------------------

create proc searchCustomerDetails
(
@term nvarchar(50)
)
as
begin
select CustomerName from tblCustomerDetails
where CustomerName like @term + '%'
end



above code works fine in normal asp.net web page for auto suggestion through textbox but i am trying to add this code on Content page of master page it is not working.

There are many ways to do same task, kindly give me solution for above code.