function getID(id,doc)
{
	if (!doc) doc = document;
	if (document.all) return doc.all[id];
	else return doc.getElementById(id);
}
function stopBubble(e)
{
	if (e.stopPropagation) e.stopPropagation();
	else e.cancelBubble = true;
}
function stopDefault(e)
{
	if (e.preventDefault) e.preventDefault();
	else e.returnValue = false;
}
/* opens window and cancels the event if successfull */
function openAWin(path,width,height,ev,namewin) 
{
	if (!ev) ev = window.event;
	if (!ev) { alert("No event in openAWin"); return false; }
	if (!openWin(path,width,height,namewin)) return null;
	stopDefault(ev); stopBubble(ev);
	return false;
}

/* opens full window and cancels the event if successfull*/
function openAWinF(path,width,height,ev,namewin) 
{
	if (!ev) ev = window.event;
	if (!ev) { alert("No event in openAWin"); return false; }
	if (!openWinF(path,width,height,namewin)) return null;
	stopDefault(ev); stopBubble(ev);
	return false;
}


function openWin(path,width,height,namewin)
{
	if(window.anewWin)
		window.anewWin.close();
	if(!namewin) namewin = 'nove_okno';
	anewWin = window.open(path,namewin,"width="+width+",height="+height+",toolbar=0,directories=0,menubar=0,status=0,scrollbars=yes,resizable=yes");
	return anewWin;
}

function openWinF(path,width,height,namewin)
{
	if(window.anewWin)
		window.anewWin.close();
	if(!namewin) namewin = 'nove_okno';
    anewWin = window.open(path,namewin,'menubar=yes,toolbar=yes,location=yes,directories=yes,fullscreen=no,titlebar=yes,hotkeys=yes,status=yes,scrollbars=yes,resizable=yes');
	return anewWin;
}



function targetBlank (url,ev) 
{
	if (!ev) ev = window.event;
	if (!ev) { alert("No event in targetBlank"); return false; }
	if (!window.open(url,'_blank','menubar=yes,toolbar=yes,location=yes,directories=yes,fullscreen=no,titlebar=yes,hotkeys=yes,status=yes,scrollbars=yes,resizable=yes')) return null;
	stopDefault(ev); stopBubble(ev);
	return false;
}

function hidde_objects(objects) {
	var h;
	var j = 0;
	this.hidde = new Array();
	if (objects) 
	    for (var i =0; i <objects.length;i++) {
			h = false;
			h = getID(objects[i]);
			if (h) {
				this.hidde[j] = h;
				this.hidde[j].style.visibility='hidden';
				j++;
			} 
	    }
}

/* example of usage:
	 //hidde objects with id='src' and id='dst'
	 var = new hidde_objects(['src','dst']);
	 ....
	 // unhidde objects ...
	 visible_objects(var);
*/

function visible_objects(objects) {
	if (!objects) return;
	for (var i = 0; i < objects.hidde.length; i++)  {
		objects.hidde[i].style.visibility='visible';
	}
}

function ttypchanged(obj) { // TODO: K cemu to je??
	return true;
}

function checkedAll (id, checked)
{
  var el = getID(id);
  for (var i = 0; i < el.elements.length; i++) {
	el.elements[i].checked = checked;
  }
}

// fce "show-x-hidden" schova x zobrazi div nebo prvek s ID!
// prepinace: 
// switch_id = prepinac
// switch_value = true hodnota prepinace
// show_id = id zobrazene
// hidden_id = id schovane, nepovinne
function show_x_hidden(switch_id, switch_value ,show_id, hidden_id)
{
	var el = getID(switch_id);
	if(!el) return '';
	var show_div = getID(show_id);
	if(hidden_id)
		var hidden_div = getID(hidden_id);
	if(el.value == switch_value) {
		show_div.style.display = 'none';
		if(hidden_id)
			hidden_div.style.display = 'block';
	}
	else {
		show_div.style.display = 'block';
		if(hidden_id)
			hidden_div.style.display = 'none';
	}
}

function hideid(id)
{
	var id = getID(id);
	if(!id) return '';
	id.style.display = 'none';
}

function checkAmount(el) {
  if(!/^[1-9]+\d*$/.test(el.value)) {
//	el.value = '';
	alert("Cena musí být kladné číslo");
	el.focus();
	return false;
  }
}

function isValidDate(text) {
	if (/^\d{1,2}\.\d{1,2}.\d{4}$/.test(text)) {
		var dmy = text.split(".");
		var d = dmy[0] - 0;
		var m = dmy[1] - 1;
		var y = dmy[2] - 0;
		var date = new Date(y, m, d);
		return (date.getDate() == d && date.getMonth() == m && date.getFullYear() == y);
	}
	return false;
} 

function isValidDateVal(obj,povinnost) {
	if(!obj.value && !povinnost)
		return true;
	var text = obj.value;
	if(!isValidDate(text)) {
		alert("Datum není platné. Zadejte formát dd.mm.rrrr.");
//		obj.focus();
		return false;
	}
	return true;
}

function isValidDateFromID()
{
	var id;
	for (i=0; i < arguments.length; i++) {
		id = getID(arguments[i]);
		if(!isValidDateVal(id, true))
			return false;
	}
	return true;
}

function form_vyhl_refresh(id) {
	var ch_val = getID(id);
	var reload_div = getID("reload_info");
	var id_lokality = getID("id_lokality");
	var id_mista = getID("id_mista");
	reload_div.style.display = "block";
	if(ch_val.id == "id_zeme") {
		id_lokality.value="";
		id_mista.value="";
	}
	else if(ch_val.id == "id_lokality") {
		id_mista.value="";
	}
	document.forms['vyhled_zajezd'].action = "vyhledej_zajezd.php"; 
	document.forms['vyhled_zajezd'].submit();
}

function form_refresh(id) {
	var ch_val = getID(id);
	var id_lokality = getID("id_lokality");
	var id_mista = getID("id_mista");
	var nazev_zeme_new = getID("nazev_zeme_new");
	var nazev_lokality_new = getID("nazev_lokality_new");
	var nazev_mista_new = getID("nazev_mista_new");
	if(ch_val.id == "id_zeme") {
		id_lokality.value=1;
		id_mista.value=1;
		if(nazev_zeme_new) nazev_zeme_new.value='';
		if(nazev_lokality_new) nazev_lokality_new.value='';
		if(nazev_mista_new) nazev_mista_new.value='';
	}
	else if(ch_val.id == "id_lokality") {
		id_mista.value=1;
		if(nazev_zeme_new) nazev_zeme_new.value='';
		if(nazev_lokality_new) nazev_lokality_new.value='';
		if(nazev_mista_new) nazev_mista_new.value='';
	}
	document.forms['edit_zajezd'].action = "zajezd_sql.php?part=1";
	document.forms['edit_zajezd'].submit();
}

function checkform(frm) {
	// kontrola zadani cen pouze pro zajezdy s pevnymi terminy pro volitelne nezadavame ceny!
	var str = "";
	var frstpovinne = false;
	if(frm.id=="form_order" && !checkformPrice())
		  return false;
	for (i=1; i < arguments.length; i++) {
		if(frm[arguments[i]] && frm[arguments[i]].value == '') {
			if(!frstpovinne)
				frstpovinne = arguments[i];
			str += "Pole '"+ povinne[frm[arguments[i]].name]+"' je povinné.\n";
		}
	}
	// vystup alert
	if(str) {
		frm[frstpovinne].focus();
		alert(str);
		return false;
	}


	if(!checkcaptchafill()) {
		return false;
	}		

	if(frm.name=="form_order") {
		document.forms["form_order"].submit();
		return false;
	}
	if(frm.cena)
		return checkAmount(frm.cena);
	return true;
}

function forward_form_submit(id,url) {
	var id_form = getID(id);
	document.forms[id_form.id].action = url;
	document.forms[id_form.id].submit();
}

function checkformPrice() {
	var form = document.forms["form_order"];
	var pocet = form.elements['pocet[]'];
	var pov = form.elements['pov[]'];
	for(i=0; i < pocet.length; i++) {
		if(pov[i].value == "ano" && pocet[i].value <= 0) {
			alert('Ceny označené ! jsou povinné!');
			return false;
		}
	}
	return true;
}

function countSumOrder() {
	var form = document.forms["form_order"];
	var cena = form.elements['cena[]'];
	var pocet = form.elements['pocet[]'];
	var regexp = /[^\d]+/;
	var sum = 0;	
	var val = '';
//	alert(cena.length);
	for(i=0; i < cena.length; i++) {
		val = pocet[i].value;
		val = val.replace(regexp, '');
		pocet[i].value = val.replace(regexp, '');
		nasobek = pocet[i].value == "" ? parseFloat(0) : parseFloat(pocet[i].value);
		cenaval = parseFloat(cena[i].value);
		sum += (cenaval*nasobek);
	}
  form.elements["sum_prices"].value = sum;

  celkem_field = getID("cena_sum");
  celkem_field.innerHTML = outputComma(sum);
}

function outputComma(number) {
  number = '' + number
	if (number.length > 3) {
	  var mod = number.length%3;
	  var output = (mod > 0 ? (number.substring(0,mod)) : '');
	  for (i=0 ; i < Math.floor(number.length/3) ; i++) {
		if ((mod ==0) && (i ==0))
		  output+= number.substring(mod+3*i,mod+3*i+3);
		else
		  output+= ' ' + number.substring(mod+3*i,mod+3*i+3);
	  }
	  return (output);
	}
	else return number;
}

function confirm_group_term ()
{	
	idhg = getID("hromad_id_G");
	if(!idhg.value) {
		alert('Vyberte cenovou skupinu!');
		return false;
	}		
	return confirm('Opravdu přiřadit cenovou skupinu ke všem termínům?')
}

function checkcaptchafill()
{
	var c_id = getID("c");
	var ct_id = getID("ct");
	var alert_id = getID("captcha_alert");
//	alert (MD5(ct_id.value));
	if(!trim(ct_id.value)) {
		alert(alert_id.value);
		ct_id.focus();
		return false;
	}

	if(MD5(trim(ct_id.value)) != c_id.value) {
		alert(alert_id.value);
		ct_id.focus();
		return false;
	}
	return true;
}

function trim(s)
{
  return rtrim(ltrim(s));
}

function ltrim(s)
{
  var l=0;
  while(l < s.length && s[l] == ' ')
  {	l++; }
  return s.substring(l, s.length);
}

function rtrim(s)
{
  var r=s.length -1;
  while(r > 0 && s[r] == ' ')
  {	r-=1;	}
  return s.substring(0, r+1);
}