function updateDep() {
	var arr = new Date( document.getElementById('arr_y').value, parseInt(document.getElementById('arr_m').value) - 1, document.getElementById('arr_d').value );
	var dep = new Date( document.getElementById('arr_y').value, parseInt(document.getElementById('arr_m').value) - 1, parseInt(document.getElementById('arr_d').value) + 1 );

	document.getElementById('arr_y').value = (arr.getYear());
	document.getElementById('arr_m').value = arr.getMonth() + 1,
	document.getElementById('arr_d').value = arr.getDate();

	document.getElementById('dep_y').value = dep.getYear();
	document.getElementById('dep_m').value = dep.getMonth() + 1,
	document.getElementById('dep_d').value = dep.getDate();
}

function submitNB() {
	url = 'https://secure.netbooking.cz/union/index.html?arrival='
		+ document.getElementById('arr_d').value + '.'
		+ document.getElementById('arr_m').value + '.'
		+ document.getElementById('arr_y').value
		+ '&departure='
		+ document.getElementById('dep_d').value + '.'
		+ document.getElementById('dep_m').value + '.'
		+ document.getElementById('dep_y').value;
	window.open(url, '', ',width=1000,height=780,scrollbars=1,status=1,resizable=1,left=25,right=25');
	//alert( url );
}


/* Funkce kontrolaForm() - parametr form */
function kontrolaFormEn(form) {
	if(form.ORD_01_NAME.value == "" || form.ORD_04_ARRIVAL.value == "" || form.ORD_05_LEAVING.value == "" || form.ORD_06_APARTMENT_DOUBLE.value == "" || form.ORD_07_APARTMENT_3BED.value == "" || form.ORD_08_APARTMENT_2.value == "" || form.ORD_09_APARTMENT_PENTHOUSE.value == "" || form.ORD_10_NUMBER_OF_PERSON.value == "" || form.ORD_11_CARD_TYPE.value == "" || form.ORD_13_CARD_NUMBER.value == "" || form.ORD_14_EXPIRY_DATE.value == "" || form.ORD_16_CVC_CODE.value == ""){
		alert("Please fill in all required items.");
		form.ORD_01_NAME.focus(); 
		return false;
	} else if(form.ORD_03_EMAIL.value == "" || form.ORD_03_EMAIL.value.indexOf('@')==-1 || form.ORD_03_EMAIL.value.indexOf('.')==-1){
		alert("Please fill in the e-mail field.");
		form.ORD_03_EMAIL.focus();
		return false;	
	} else {
		form.submit();
		return true;
	}
}


/* Funkce kontrolaForm() - parametr form */
function kontrolaFormCz(form) {
	if(form.ORD_01_NAME.value == "" || form.ORD_04_ARRIVAL.value == "" || form.ORD_05_LEAVING.value == "" || form.ORD_06_APARTMENT_DOUBLE.value == "" || form.ORD_07_APARTMENT_3BED.value == "" || form.ORD_08_APARTMENT_2.value == "" || form.ORD_09_APARTMENT_PENTHOUSE.value == "" || form.ORD_10_NUMBER_OF_PERSON.value == "" || form.ORD_11_CARD_TYPE.value == "" || form.ORD_13_CARD_NUMBER.value == "" || form.ORD_14_EXPIRY_DATE.value == "" || form.ORD_16_CVC_CODE.value == ""){
		alert("Prosím, vyplňte všechny povinné položky.");
		form.ORD_01_NAME.focus(); 
		return false;
	} else if(form.ORD_03_EMAIL.value == "" || form.ORD_03_EMAIL.value.indexOf('@')==-1 || form.ORD_03_EMAIL.value.indexOf('.')==-1){
		alert("Prosím, vyplňte pole e-mail.");
		form.ORD_03_EMAIL.focus();
		return false;	
	} else {
		form.submit();
		return true;
	}
}