function load() {
	canSubmit();
}

function canSubmit() {
	var prenom = document.getElementById('prenom').value;
	var nom = document.getElementById('nom').value;
	var societe = document.getElementById('societe').value;
	var fonction = document.getElementById('fonction').value;
	var mac = document.getElementById('mac').value;
	var macosx = document.getElementById('macosx').value;
	var email = document.getElementById('email').value;
	var adresse = document.getElementById('adresse').value;
	var tel = document.getElementById('tel').value;
	var resaChoix = document.getElementById('reservation_choix').checked;
	
	var form_submit = document.getElementById('form_submit');
	
	var canSubmitForm = (prenom.length > 0 && 
		nom.length > 0 && 
		societe.length > 0 &&
		fonction.length > 0 &&
		mac.length > 0 &&
		macosx.length > 0 &&
		email.length > 0 &&
		adresse.length > 0 &&
		tel.length > 0 &&
		resaChoix);
	
	form_submit.disabled = !canSubmitForm ? "disabled" : "";

	form_submit.src = "../images/structure/bouton_envoyer" + (canSubmitForm ? "" : "_invalide") + ".png";

	return !form_submit.disabled;
}