function valideFormDesignJeunesse(langue){
	 
	var tblMessage = new Array(new Array(), new Array());

	tblMessage[0][0] = "Tu dois entrer ton prénom.";
	tblMessage[1][0] = "You must enter your first name.";
	tblMessage[0][1] = "Tu dois entrer ton âge.";
	tblMessage[1][1] = "You must enter your age.";
	tblMessage[0][2] = "Tu dois entrer ta suggestion de nom pour la tomate de Claude.";
	tblMessage[1][2] = "You must enter your name suggestion for Claude's tomato.";
	tblMessage[0][3] = "Tu dois indiquer le nom de ton école.";
	tblMessage[1][3] = "You must enter the name of your school.";
	tblMessage[0][4] = "Tu dois indiquer ton arrondissement.";
	tblMessage[1][4] = "You must enter your borough.";
	tblMessage[0][5] = "Tu dois indiquer ton adresse postale.";
	tblMessage[1][5] = "You must enter your home address.";	
	tblMessage[0][6] = "Tu dois indiquer ton numéro de téléphone à la maison.";
	tblMessage[1][6] = "You must enter your home telephone number.";	
	tblMessage[0][7] = "Tu dois indiquer ton adresse courriel.";
	tblMessage[1][7] = "You must enter your e-mail address.";	
	tblMessage[0][8] = "Veuillez entrer un courriel valide.";
	tblMessage[1][8] = "Please enter a valid e-mail adress.";
	tblMessage[0][9] = "Tu dois dire avec qui tu as participé aux journées Portes Ouvertes Design Montréal.";
	tblMessage[1][9] = "You must say with whom you participated in Doors Open Design Montreal.";	
	tblMessage[0][10] = "Tu dois entrer le nombre de lieux que tu as visités.";
	tblMessage[1][10] = "You must enter the number of places that you visited.";	
	tblMessage[0][11] = "Tu dois préciser ce que tu as préféré.";
	tblMessage[1][11] = "You must say what you preferred.";		
	tblMessage[0][12] = "Tu dois dire ce que tu as appris.";
	tblMessage[1][12] = "You must say what you learned.";			
	tblMessage[0][13] = "Tu dois dire si tu as l'intention de participer à nouveau l'an prochain.";
	tblMessage[1][13] = "You must say if you would participate again next year.";		
		  
	with (document.form_courriel) {

		if(prenom.value == "" ) {
			alert(tblMessage[langue][0]); 
			prenom.focus();
			return false;
		}
		
		nom.value = prenom.value;

		if(age.value == "" ) {
			alert(tblMessage[langue][1]); 
			age.focus();
			return false;
		}
		
		if(nom_suggere.value == "" ) {
			alert(tblMessage[langue][2]); 
			nom_suggere.focus();
			return false;
		}

		if(ecole.value == "" ) {
			alert(tblMessage[langue][3]); 
			ecole.focus();
			return false;
		}

		if(arrondissement[arrondissement.selectedIndex].value == "#" ) { 
			alert(tblMessage[langue][4]); 
			arrondissement.focus();
			return false;
		}

		if(adresse.value == "" ) {
			alert(tblMessage[langue][5]); 
			adresse.focus();
			return false;
		}
		
		if(telephone.value == "" ) {
			alert(tblMessage[langue][6]); 
			telephone.focus();
			return false;
		}

		if (courriel.value == "") { // vérifie qu'on a entré un courriel
			alert(tblMessage[langue][7]); 
			courriel.focus();
			return false;
		}
	
		else {
			if(courriel.value != ""){			  
				 var reg = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]{2,}[.][a-zA-Z]{2,4}$/
				 if (reg.exec(courriel.value)==null) { // vérifie si le champ courriel est valide 
					alert(tblMessage[langue][8]);
					courriel.focus();
					return false;
				 }
			}
		}		

		if(participe_avec_parent.checked == false && participe_avec_amis.checked == false && participe_avec_professeur.checked == false && participe_avec_classe.checked == false) {
			alert(tblMessage[langue][9]); 
			participe_avec_parent.focus();
			return false;
		}

		if(nb_lieux_visites[nb_lieux_visites.selectedIndex].value == "0" ) { 
			alert(tblMessage[langue][10]); 
			nb_lieux_visites.focus();
			return false;
		}
		
		if(preferences.value == "" ) {
			alert(tblMessage[langue][11]); 
			preferences.focus();
			return false;
		}

		if(apprentissage.value == "" ) {
			alert(tblMessage[langue][12]); 
			apprentissage.focus();
			return false;
		}		
		
		var participation_entree = false;
		for (var i = 0; i < intention_participer.length; i++)
			if (intention_participer[i].checked)
				participation_entree = true;
		if(!participation_entree) {
			alert(tblMessage[langue][13]); 
			intention_participer[0].focus();
			return false;			
		}
	}
}