$(document).ready(function(){

    var FNAME_TEXT = "Name";
    var LNAME_TEXT = "Name";

    var EMAIL_TEXT = "Address";
    
function checkValid(e) {
   
    if( $("#firstname").val() == "" || $("#firstname").val() == FNAME_TEXT){
        $("#submitBtn").attr("disabled", "true");
        $("#submitBtn").addClass("disabled");

        return;
    }

    if( $("#lastname").val() == "" || $("#lastname").val() == LNAME_TEXT){
        $("#submitBtn").attr("disabled", "true");
        $("#submitBtn").addClass("disabled");
  
        return;
    }
  
    if( $("#email").val() == "" || $("#email").val() == EMAIL_TEXT){
        $("#submitBtn").attr("disabled", "true");
        $("#submitBtn").addClass("disabled");
    
        return;
    }    
 
    $("#submitBtn").removeAttr("disabled");
    $("#submitBtn").removeClass("disabled");
}

$(".fancy").bind("keyup", checkValid);

$("#submitBtn").addClass("disabled");
$("#submitBtn").attr("disabled","true");

});