my question is continuation of what i have posted here

i want to know how to display a result status based on my return result from Web Method

here is my post code:

beforeSubmit: function(data) {

var myData = { "firstName": escape($('#txtFirstName').val()), "lastName": escape($('#txtLastName').val()) };

  $.ajax(<br>

{
type: "POST",
url: "VisitorWS.asmx/AddVisitors",
data: JSON.stringify(myData),
contentType: "application/json; charset=utf-8",
dataType: "json",

success: function(data)
{
$("#status").fadeTo(500, 1, function() { $(this).html("You are now registered!").fadeTo(5000, 0); })
},
error: function(data) {
$("#status").fadeTo(5000, 1, function() { $(this).html("Failed!").fadeTo(5000, 0); })
}
});

WebMethod
[WebMethod]
public bool AddVisitors(string firstName, string lastName)
{
if (firstName == "test")
{
return true;
}
return false;
}

so based on true or false i want to display a message on the client side.