function zwinVouchery() {
	vouchery = document.getElementsByClassName('voucher_opis','pakiety_vouchery');
	vlen = vouchery.length;
	
	for(var i = 0; i < vlen; i++) {
		Element.hide(vouchery[i]);
	}
}

function pokazVouchery() {
	vouchery = document.getElementsByClassName('pakiet_voucher','pakiety_vouchery');
	vlen = vouchery.length;
	
	for(var i = 0; i < vlen; i++) {
		Element.show(vouchery[i]);
	}
}

function ukryjVouchery() {
	vouchery = document.getElementsByClassName('pakiet_voucher','pakiety_vouchery');
	vlen = vouchery.length;
	
	for(var i = 0; i < vlen; i++) {
		Element.hide(vouchery[i]);
	}
}

function ukryjFormularz() {
	zwinVouchery();
	Element.hide('voucher_formularz');
}

function pokazFormularz() {
	Element.show('overlay');
	zwinVouchery();
	Element.show('voucher_formularz');
}