$.validator.addMethod( "dateNL", function( value, element ) {
	return this.optional( element ) || /^(0?[1-9]|[12]\d|3[01])[\.\/\-](0?[1-9]|1[012])[\.\/\-]([12]\d)?(\d\d)$/.test( value );
}, $.validator.messages.date );
;