call serverside function from javascript and return string array and set values of textbox

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C#

ASP.NET

Javascript

hi guys...i have written this piece of code of javascript which calls server side function and sets value for one code...i tried to return the array also but its just not working ...javascript doesn't give the result that i want.

Javascript :

<script type="text/javascript">
   function CallMe(src,dest,dest1)
{
    var ctrl = document.getElementById(src);
    // call server side method
    //alert(ctrl.value);
    PageMethods.getData(ctrl.value, CallSuccess, CallFailed, dest);
}

// set the destination textbox value with the ContactName
function CallSuccess(res, destCtrl)
{
    var dest = document.getElementById(destCtrl);
    dest.value = res;
}

// alert message on some failure
function CallFailed(res, destCtrl)
{
    alert(res.get_message());
}
   </script>
   <script type="text/javascript">
   function CallMe(src,dest)
{
    var ctrl = document.getElementById(src);
    // call server side method
    //alert(ctrl.value);
    PageMethods.getData(ctrl.value, CallSuccess, CallFailed, dest);
}

// set the destination textbox value with the ContactName
function CallSuccess(res, destCtrl)
{    alert(res);
    var dest = document.getElementById(destCtrl);
    dest.value = res;
}

// alert message on some failure
function CallFailed(res, destCtrl)
{
    alert(res.get_message());
}
   </script>

Page Load: I add the atrribute at pageload

txtmobileno.Attributes.Add("onblur", "javascript:CallMe('" + txtmobileno.ClientID + "', '" + txtname.ClientID + "')");

Fucntion :

[System.Web.Services.WebMethod]
public static  string getData(string _mobileno)
{
    if (_mobileno == null || _mobileno.Length == 0)
    {
        return String.Empty;
    }
    else
    {
        OleDbConnection conn = null;
        string cnstring = ConfigurationSettings.AppSettings["ConnectionString"];
        conn = new OleDbConnection(cnstring);
        string _strQry = "Select distinct VISITOR_NAME from VISITOR_REG where MOBILE_NO=" + _mobileno + "";
        OleDbCommand cmd = new OleDbCommand(_strQry, conn);
        cmd.Parameters.AddWithValue("MOBILE_NO", _mobileno);
        conn.Open();
        string name = Convert.ToString(cmd.ExecuteScalar());
        return name;
    }
}

Now it works fine for just Visitor name, but if i change query and add COMPANY_NAME field to the query and make necessary changes which returns the array as it would be 2 fields..javascript doesnt give me the correct output.

changed javascript :

<script type="text/javascript">
   function CallMe(src,dest,dest1)
{
    var ctrl = document.getElementById(src);
    // call server side method
    //alert(ctrl.value);
    PageMethods.getData(ctrl.value, CallSuccess, CallFailed, dest);
}

// set the destination textbox value with the ContactName
function CallSuccess(res, destCtrl,destCtrl1)
{
    var dest = document.getElementById(destCtrl);
    alert(dest);
    var dest1 = document.getElementById(destCtrl1);
    alert(dest1);
    dest.value = res[0];
    dest1.value=res[1];
}

// alert message on some failure
function CallFailed(res, destCtrl,destCtrl1)
{
    alert(res.get_message());
}
   </script>

changed attribute at page load

txtmobileno.Attributes.Add("onblur", "javascript:CallMe('" + txtmobileno.ClientID + "', '" + txtname.ClientID + "','"+txtcompany.ClientID+"')");

changed function :

[System.Web.Services.WebMethod]
public static  string[] getData(string _mobileno)
{
        OleDbConnection conn = null;
        string cnstring = ConfigurationSettings.AppSettings["ConnectionString"];
        conn = new OleDbConnection(cnstring);
        string _strQry = "Select distinct VISITOR_NAME,COMPANY from VISITOR_REG where MOBILE_NO=" + _mobileno + "";
        OleDbCommand cmd = new OleDbCommand(_strQry, conn);
        cmd.Parameters.AddWithValue("MOBILE_NO", _mobileno);
        conn.Open();
        //string name = Convert.ToString(cmd.ExecuteScalar());
        //return name;
        DataSet ds = new DataSet();
        OleDbDataAdapter da = new OleDbDataAdapter(cmd);
        da.Fill(ds);
        //return (ds.Tables[0]);
        string[] data = new string[ds.Tables[0].Columns.Count];
        for (int i = 0; i < ds.Tables[0].Columns.Count; i++)
        {
            data[i] = ds.Tables[0].Columns[i].ToString();
        }
        return data;

}

Help me...