var dom = true;
if (!document.getElementById) dom = false;
if (!document.getElementById && document.all) {document.getElementById = document.all; dom = true;}

function isEmpty(e) {
  return ((e == null) || (e.length == 0));
}

function isEmail(mail) {
  re = /^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,7}$/;
  return mail.search(re) == 0;
}

function isInt(value){
  if (parseInt(value).toString() == value.toString() && !isNaN(value)){
    return true;
  } else {
    return false;
  }
}

function isFloat(value){
  return value.search(/^((\d+(\.\d*)?)|((\d*\.)?\d+))$/) == 0;
}

/* JW FLV PLAYER VIDEO TRACKING */
/* list of video files played */
var videoPlayed = new Array();

/* called by JW FLV PLAYER after SWF is loaded */
function playerReady(obj) {
	addListeners(obj.id);
}

/* listener triggered on state change */
function playerPlay(obj) {
  if (obj.newstate=='PLAYING') {
    if (videoPlayed.indexOf(obj.id)==-1) {
      //alert('playerPlay: '+obj.id);
      videoPlayed.push(obj.id);
      if (pageTracker!=null) {
        pageTracker._trackEvent('Videos', 'Play', obj.id);
      }
      else {
        //alert('playerPlay: tracker not found!');
      }
    }
  }
}

/* attempts to add listener for a video, if player is not ready, waits for 100 milliseconds befor trying again */
function addListeners(playerID) {
  var player;
  player = document.getElementById(playerID);
  if (!player) {
    setTimeout("addListeners('"+playerID+"')",100);
  }
  else {
    player.addModelListener("STATE", "playerPlay");
  }
}

/*tab-boxy*/
var dom = true;
if (!document.getElementById) dom = false;
if (!document.getElementById && document.all) {document.getElementById = document.all; dom = true;}
isIE = (document.all && !window.opera) ? true:false;
function objekt(what) {return document.getElementById(what);}

window.onload = init;

function init() {
	var hash = location.hash.substr(1);
	switchOff();
	if (hash.indexOf("tab") > -1)	{
		switchOn(hash, 1);
	}
	else {
		if (objekt("tab1") != null) switchOn('tab1');
		else if (objekt("tab2") != null) switchOn('tab2');
		else if (objekt("tab3") != null) switchOn('tab3');
		else if (objekt("tab4") != null) switchOn('tab4');
		else if (objekt("tab5") != null) switchOn('tab5');
	}
	for (i = 0; i < document.getElementsByTagName("a").length; i++) {
		if (document.getElementsByTagName("a")[i].className == "bluebox-off") {
			text = document.createTextNode("Skrýt");
			document.getElementsByTagName("a")[i].appendChild(text);
		}
	}
}
// zneviditelni vsechny divy s id obsahujici tabN, kde N je cislo, u vsech zalozek tabN zrusi tridu
function switchOff() {
	for (i = 1; i < document.getElementsByTagName("div").length + 1; i++) {
		if (objekt("tab" + i) != null) {
			objekt("tab" + i).style.display = "none";
			objekt("tab" + i + "link").className = "";
		}
		if (objekt("features" + i) != null) {
			objekt("features" + i).style.display = "none";
			objekt("features" + i + "link").style.display = "inline";
		}
	}
}

//zviditelni div s predanym id, aktivuje danou zalozku
function switchOn(allowed, reload) {
	switchOff();
	objekt(allowed).style.display = "block";
	objekt(allowed + "link").className = "active";
	if (reload) {
		document.location.href="#"+ allowed;
	}
	return false;
}

//zviditelni div s predanym id, deaktivuje dany odkaz
function featuresOn(allowed) {
	switchOff();
	objekt(allowed + "link").style.display = "none";
	objekt(allowed).style.display = "block";
	return false;
}

//zneviditelni div s predanym id, aktivuje dany odkaz
function featuresOff(hidden) {
	objekt(hidden).style.display = 'none';
	objekt(hidden + "link").style.display = 'inline';
	return false;
}