function Valid_form() {
	
	if(document.form_contact.entreprise.value != "" && document.form_contact.contact.value != "" && document.form_contact.mail.value != "" && document.form_contact.message.value != "") {
		//Validation mail
		var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
		var address = document.form_contact.mail.value;
		if(reg.test(address) == false) {
			alert('Adresse Mail non valide');
			return false;
		}
		
		document.form_contact.submit();
	}
	else {
		alert("Veuillez renseigner tous les champs obligatoires !");
	}
	
}