// JavaScript Document

var xmlhttp = false;
if(window.XMLHttpRequest){
     xmlhttp = new XMLHttpRequest();
}
else if(window.ActiveXObject){
     xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}

function playMP3(url){
     if(xmlhttp){
          var obj = document.getElementById("prehravac");
          xmlhttp.open("GET", url, true);
          xmlhttp.setRequestHeader('Contect-type', 'audio/mpeg');
          xmlhttp.onreadystatechange = function() {
               if(xmlhttp.readyState == 1){ obj.innerHTML = 'nacitani...'; }
               if(xmlhttp.readyState == 2){ obj.innerHTML = 'nacteno...'; }
               if(xmlhttp.readyState == 3){ obj.innerHTML = 'interaktiv...'; }
               if(xmlhttp.readyState == 4 && xmlhttp.status == 200){
                    return xmlhttp.responseStream;
               }
          }
          xmlhttp.send(null);
     }
}

/*==================================AJAX========================================*/
function getBrowser(){
     var browser = navigator.appName;
     if(browser=='Netscape'){ prohlizec = 'F'; }
     if(browser=='Microsoft Internet Explorer'){ prohlizec = 'IE'; }
     if(browser=='Opera'){ prohlizec = 'O'; }
     return prohlizec;
}

function showPlagos(){
     var pr = getBrowser();
// urceni elementu
	var obj = document.getElementById('plagos');
// zjisteni sirky vysky
	obj.style.display = 'inline';
	sirka = obj.offsetWidth;
	obj.style.display = 'block';
	vyska = obj.offsetHeight;
	//window.alert(sirka+' '+vyska);
// velikost okna prohlizece
	if(window.innerWidth){ sirkaCelkem = window.innerWidth; }
	else{ sirkaCelkem = document.body.offsetWidth; }
	if(window.innerHeight){ vyskaCelkem = window.innerHeight; }
	else{ vyskaCelkem = document.body.offsetHeight; }
	x = sirkaCelkem-sirka;
	y = vyskaCelkem-vyska;
	//pozice obrazku
	if(!obj.style.top){ obj.style.top = '0px'; }
	if(!obj.style.left){ obj.style.left = '0px'; }
	xx = x/2;
	yy = y/2;
	xx = parseInt(xx);
	yy = parseInt(yy);
	// zaviraci okynko
	var closeD = document.createElement('div');
	closeD.innerHTML = 'X';
	with(closeD.style){
		background = '#FFF';
		color = '#000';
		fontWeight = 'bold';
		position = 'absolute';
		width = '20px';
		height = '15px';
		top = '0px';
		right = '0px';
		cursor = 'hand';
		cursor = 'pointer';
	}
	obj.appendChild(closeD);
	// pozadi
	var body = document.getElementsByTagName('body').item(0);
	var bg = document.createElement('div'); // vytvoreni pozadi
	body.appendChild(bg);
	with(bg.style){
		display = 'block';
		top = '0px';
		left = '0px';
		width = '100%';
		if(pr=='IE'){
			height = document.body.clientHeight+'px';
		}
		else{ height = '100%'; }
		if(pr=='F' || pr=='O'){ position = 'fixed'; }
		else{ position = 'absolute'; }
		visibility = 'visible';
		zIndex = '50';
		//background = '#E1DDAD';
		//background = '#A30000';
		background = '#000';
		opacity = "0.50";
		filter = 'alpha(opacity=50)';
	}
	//obrazek
	with(obj.style){
		textAlign = 'center';
		display = 'block';
		border = '1px solid #FFF';
		position = 'absolute';
		background = '#FFF';
		zIndex = '100';
		visibility = 'visible';
		left = xx+'px';
		top = yy+'px';	
	}
	closeD.onclick = function(){
		body.removeChild(bg);
		obj.style.display = 'none';
	}
	bg.onclick = function(){
		body.removeChild(bg);
		obj.style.display = 'none';
	}
}

function menu_on(id) {
for(i=1;i<2;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 menu_off_all(id){
for(i=1;i<2;i++){
		if(i!=id) {
			document.getElementById('menu'+String(i)).style.visibility="hidden";
		}
	}
}

// JavaScript Document
<!--
    var win=null;
    
    function NewWindow(mypage,myname,w,h,scroll,pos){
    
    if(pos=="random"){LeftPosition=(screen.availWidth)?Math.floor(Math.random()*(screen.availWidth-w)):50;TopPosition=(screen.availHeight)?Math.floor(Math.random()*((screen.availHeight-h)-75)):50;}
    if(pos=="center"){LeftPosition=(screen.availWidth)?(screen.availWidth-w)/2:50;TopPosition=(screen.availHeight)?(screen.availHeight-h)/2:50;}
    if(pos=="default"){LeftPosition=50;TopPosition=50}
    
    else if((pos!="center" && pos!="random" && pos!="default") || pos==null){LeftPosition=0;TopPosition=0}
      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);
    if(win.focus){win.focus();}}
    
    function CloseNewWin(){if(win!=null && win.open)win.close()}
    
    window.onfocus=CloseNewWin;
// -->