function tree_zmena(objLI, objIMG){
	objLI = document.getElementById(objLI);
	objIMG = document.getElementById(objIMG);
	if (objIMG.className == 'plus') {
		objIMG.className = 'minus';
		objLI.style.display = 'block';
	} else {
		objIMG.className = 'plus'
		objLI.style.display = 'none';
	}
}


function closepopup(){
	var obj = document.getElementById('zoom');
	obj.style.display = 'none';
	var bigimg = document.getElementById('zoomimg');
	bigimg.src = '/images/loading.gif';
}

function zoompopupWindow(img, w, h){
	var scrWidth = document.body.clientWidth;
	var scrHeight = document.body.clientHeight + 35;
	var brWidth = document.documentElement.clientWidth;
	var brHeight = document.documentElement.clientHeight;
	if (scrHeight < brHeight) scrHeight = brHeight;

	var zoom = document.getElementById('zoom');
	zoom.style.width = scrWidth + 'px';
	zoom.style.height = scrHeight + 'px';

	var bigimg = document.getElementById('zoomimg');
	bigimg.src = img;

	var div = document.getElementById('zoomdiv');
	div.style.width = w + 'px';
	div.style.height = (h + 20) + 'px';

	var obj = document.getElementById('zoom');
	obj.style.display = 'block';

	if (typeof(window.pageXOffset) == 'number'){
		var scrollX = window.pageXOffset;
		var scrollY = window.pageYOffset;
	} else if (document.body && (document.body.scrollLeft || document.body.scrollTop)) {
		var scrollX = document.body.scrollLeft;
		var scrollY = document.body.scrollTop;
	} else if (document.documentElement && (document.documentElement.scrollLeft || document.documentElement.scrollTop)){
		var scrollX = document.documentElement.scrollLeft;
		var scrollY = document.documentElement.scrollTop;
	}
	if (typeof(scrollX) != 'number') scrollX = 0;
	if (typeof(scrollY) != 'number') scrollY = 0;

	var x = (brWidth - div.offsetWidth) / 2;
	var y = (brHeight - div.offsetHeight) / 2;
	if (x < 0) x = 0;
	if (y < 0) y = 0;

	div.style.left = scrollX + x + 'px';
	div.style.top = scrollY + y + 'px';
}


function showkraj(kraj, text) {
	document.getElementById('mapa').style.backgroundPosition = '0px -' + (kraj * 185) + 'px';
	document.getElementById('mapa_text').innerHTML = text;
}


function anketa(anketa_id, odpoved_id, lang){
	var url = "/anketa.php?aid=" + anketa_id + "&oid=" + odpoved_id + "&lng=" + lang;
	url = url + "&time=" + new Date().getTime();

	try {
		AJAX = new XMLHttpRequest();
	} catch (trymicrosoft){
		try {
			var AJAX = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (othermicrosoft){
			try {
				var AJAX = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (failed){
				var AJAX = null;
			}
		}
	}

	if (AJAX == null){
		alert("Váš prohlížeč nepodporuje technologii AJAX!");
	} else {
		AJAX.open ("GET", url, false);
		AJAX.setRequestHeader('Content-Type', 'text/html; charset=utf-8');
		AJAX.send (null);

		var obj = 'anketa_' + anketa_id;
		if (AJAX.responseText != '') document.getElementById(obj).innerHTML = AJAX.responseText;
	}

}