jQuery.validator.addMethod("valeurinitiale", function(value, element, params) { 
    return this.optional(element) || value.toLowerCase()!=params.toLowerCase(); 
}, jQuery.validator.format("Veuillez saisir le champ {0} ")); 



$('#formulaireContact').validate({
    submitHandler: function(form) {
        // do other stuff for a valid form
        if ($(form).valid())
        {
            $(form).ajaxSubmit(function(responseText, statusText) {
                if (responseText!="")
                    alert('probleme'+responseText);
                else {
                    $(form).resetForm();
       
                    jQuery.facebox(function() {
                        jQuery.get('resultat.php', function(data) {
                            jQuery.facebox( data )
                        })
                    })
                }
            })
        }
    },
    rules: {
        Nom: {
            required: true,
            valeurinitiale:"Nom"
        },
        Prénom: {
            required: true,
            valeurinitiale:"Prénom"
        },
        Email: {
            required: true,
            email:true,
            valeurinitiale:"Email"
        },
        captcha: {
            required: true,
            remote: {
                url: "php/verifiecaptcha1.php",
                type: "get"
            }
        }
    },

    messages:	 {
        captcha: 		{
            required: "Entrer les caractères comme sur l'image au-dessus:",
            remote: jQuery.format("le code actuel est incorrect.")
        }
    }
		
});