function validate(object,text) {

    if (object.value != "")
        return true;
    else {
        alert('Le champ : ' + text + ' est vide !');
        return false;
    }
}

function formvalidate() {

	var validated = true;
	
	if (!validate(document.forms[0].elements['Nom'],'Nom'))
        validated = false;
	if (!validate(document.forms[0].elements['Email'],'Email'))
        validated = false;
	return validated;
}