$(document).ready(function(){
  $('#mostra').hide();
  $('#carregando').hide();

  $('#btn-enviar').bind('click', function(){

    $('#mostra').html('');
    $('#mostra').hide();
    $('#carregando').fadeIn();
    $.post('contato',{ name: $('#ContactName').val(), email: $('#ContactEmail').val(), subject: 'Cadastro pelo Site' }, function(response){
      setTimeout('finishAjax("'+escape(response)+'")', 400);
    });

  });
});

function finishAjax(response) {
  var html = unescape(response);

  $('#carregando').hide();
  $('#mostra').html(html);
  $('#mostra').fadeIn();
}