var lowerCase= new RegExp(/^[a-z ,-]+$/);

        $(this).removeClass("active");

        if(!$(this).val().match(lowerCase))
        {
            $("#firstNameErrorMsg").html("First name can only contain letters.");
        }
        if($(this).val() == "")
        {
            $("#firstNameErrorMsg").html("Please enter your first name.");
        }
        else
        {
            $("#firstNameErrorMsg").html("OK");
        }