$(document).ready(function() { 
    var options = { 
//		target:        '#resultat',   // target element(s) to be updated with server response 
        success:       showResponse,  // post-submit callback 
		resetForm: true
    }; 
 
    // bind form using 'ajaxForm' 
    $('#formulaire_newsletter').ajaxForm(options); 
});

function voirReponse()  { 
	tb_show('', 'squelettes/formulaires/form_reponse.html?height=300&width=300', 'true');
	nbrSecondes = 15;
	setTimeout('tb_remove()',nbrSecondes*1000);
} 

function showResponse(responseText, statusText)  { 
    alert(responseText); 
}