Kiryn

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void country_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (country.SelectedValue == "us")
        {
            aDDL.Visible = true;
            aDDL.Enabled = true;
            bDDL.Visible = false;
            notSelectedDDL.Visible = false;
        }
        else if(country.SelectedValue == "ca")
        {
            aDDL.Visible = false;
            aDDL.Enabled = false;
            bDDL.Visible = true;
            bDDL.Enabled = true;
            notSelectedDDL.Visible = false;
        }
    }
}