function CheckForm(form){
	var message = 0;
	var popup = "";
	if(form.date.value == ""){
		message++;
	}
	if(form.date_h.value == ""){
		message++;
	}
	if(form.date_m.value == ""){
		message++;
	}
	if(form.circuit.value == ""){
		message++;
	}
	if(form.train.value == ""){
		message++;
	}
	if(form.nom.value == ""){
		message++;
	}
	if(form.prenom.value == ""){
		message++;
	}
	if(form.tel.value == ""){
		message++;
	}
	if(form.email.value == ""){		
		message++;
	}	
	if(message > 0){
		popup = "Merci de remplir tous les champs!\n";		
	}
	if(form.email.value.length  < 7 || form.email.value.indexOf("@") <= 0 || form.email.value.lastIndexOf(".") > (form.email.value.length - 3) || form.email.value.lastIndexOf(".") < form.email.value.indexOf("@")){
		popup += "Veuillez saisir une adresse e-mail valable!";
	}
	if(popup != ""){
		alert(popup);
	return false;
	}	
}