function menu_on(id) {
	for(i=1;i<8;i++) {
		if(i!=id) {
			document.getElementById('menu'+String(i)).style.visibility="hidden";
		}
	}
	document.getElementById('menu'+String(id)).style.visibility="visible";
}

function menu_off(id) {
	document.getElementById('menu'+String(id)).style.visibility="hidden";
}

function showDestinace(obj, scroll) {
	for(var i=0; i<obj.options.length;i++) {
		if(obj.options[i].selected==true) {
			document.getElementById(i).style.display="block";
		}
		else {
			document.getElementById(i).style.display="none";
		}
	}
	
	if(scroll==1) {
		showFirstSelectedListItem();
	}
}

function showFirstSelectedListItem() { 
	f = document.forms[0];
	for (i=0;i<f.elements.length;i++) { 
		if (f.elements[i].type.indexOf('select')==0) { 
			f.elements[i].options[f.elements[i].selectedIndex].selected=true; 
		}
	}
} 

function zobrazNastupniMista(limit) {
	for(var i=1; i<=limit; i++) {
		if(document.getElementById('nm_'+String(i)).style.display=="none") {
			document.getElementById('nm_'+String(i)).style.display="block";
		}
		else {
			document.getElementById('nm_'+String(i)).style.display="none";
		}
	}
}

var win=null;
function newWindow(mypage,myname,w,h,scroll,pos){
	if(pos=="random"){
		LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;
		TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
	}
	if(pos=="center"){
		LeftPosition=(screen.width)?(screen.width-w)/2:100;
		TopPosition=(screen.height)?(screen.height-h)/2:100;
	}
	else if((pos!="center" && pos!="random") || pos==null){
		LeftPosition=0;
		TopPosition=20
	}
	settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=yes';
	win=window.open(mypage,myname,settings);
}


function showImage(url){
	newWindow('http://www.zajezdy.cz/showImage.php?img='+url, 'ImgWindow', 600, 500, 'no', 'center');
}

function openSelectWindow(page) {
	var selectedOption = document.forms['sbsForm'].elements['parametr'].options[document.forms['sbsForm'].elements['parametr'].selectedIndex].value;
	newWindow(page+'&action=select&parametr='+selectedOption, 'SelectWindow', 700, 400, 'yes', 'center');
}

function openSelectWindow2(page) {
	newWindow(page, 'SelectWindow', 700, 400, 'yes', 'center');
}

function openHelp(display) {
	newWindow('/help.php?display='+display, 'HelpWindow', 700, 400, 'yes', 'center');
}

function vypocitej() {
	var celk = 0;
	var mez = 2;
	var regexp = /[^0-9]/;
	var val = '';
	if(document.forms['form'].elements['ceny[]'].length) {
		mez = document.forms['form'].elements['ceny[]'].length * 2;
	} else {
		mez = 2;
	}

	for(i=0;i<mez;i+=2) {
		a = i+1;
		val = document.forms['form'].elements[a].value;
		document.forms['form'].elements[a].value = val.replace(regexp, '');
		
		if (document.forms['form'].elements[a].value == "") {
			nasobek = parseFloat(0);
		}
		else {
			nasobek = parseFloat(document.forms['form'].elements[a].value);
		}
		cena = parseFloat(document.forms['form'].elements[i].value);
		celk += (cena*nasobek);
	}
	document.forms['form'].elements['celkem'].value = celk;
}


function over(){
inp=document.form_top.email.value;
email=/@/
if (email.test(inp)==true)
return true;
else 
window.alert("Špatně zadaná e-mailová adresa")
form_top.email.focus();
return false;
}


function kontrola(formular) {
	

	if (formular.jmeno.value=="") {
		alert("Jméno musíte vyplnit!");
		formular.jmeno.focus();
	 	return false;
	}
	else if (formular.prijmeni.value=="") {
		alert("Příjmení musíte vyplnit!");
	 	formular.prijmeni.focus();
	 	return false;
	}
	else if (formular.ulice.value=="") {
		alert("Ulici musíte vyplnit!");
		formular.ulice.focus();
		return false;
	}
	else if (formular.cp.value=="") {
		alert("Číslo popisné musíte vyplnit!");
		formular.cp.focus();
		return false;
	}
	else if (formular.obec.value=="") {
		alert("Obec musíte vyplnit!");
		formular.obec.focus();
		return false;
	}
	else if (!formular.psc.value.match (/^[\d\s]+$/)) {
		alert("PSC musíte vyplnit");
		formular.psc.focus();
		return false;
	}
                else if (formular.psc.value.match (/^[\d\s]+$/) == "")
	{
	alert("PSC musíte spravne vyplnit!");
	formular.psc.focus();
	return false;
	}
                else if (formular.pocet_dospelych.value=="") {
		alert("Počet dospělých musíte vyplnit!");
		formular.pocet_dospelych.focus();
		return false;
	}
	else if (formular.pocet_deti.value=="") {
		alert("Počet dětí musíte vyplnit!");
		formular.pocet_deti.focus();
		return false;
	}
	else if (formular.telefon.value=="") {
		alert("Telefon musíte vyplnit!");
		formular.telefon.focus();
		return false;
	}
	else
		return true;
}