function vytvoritZadost (url, parametry) {
  var http_zadost = false;
			
  if (window.XMLHttpRequest) { // Mozilla, Safari, Opera...
    http_zadost = new XMLHttpRequest();
		if (http_zadost.overrideMimeType) {
		  http_zadost.overrideMimeType('text/xml');
		}
	} else if (window.ActiveXObject) { // Internet Explorer
	  try {
		  http_zadost = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
			 http_zadost = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
			
	if (!http_zadost) {
	  alert('Error with XMLHTTP instance. Please upgrade your browser. Error code: #02');
		return false;
	}
	http_zadost.onreadystatechange = function() { stavObsahu(http_zadost, parametry); };
	http_zadost.open('GET', url, true);
	http_zadost.send(null);
	return true;
}
			    
function stavObsahu(http_zadost, parametry) {
  if (http_zadost.readyState == 4) {
		if (http_zadost.status == 200) {
			//alert(http_zadost.responseText);
			//alert(parametry);
			document.getElementById(parametry).innerHTML = http_zadost.responseText;
			var DivObj=document.getElementById('navigace_ajax_A');
			//alert(document.getElementById('navigace_ajax_A').innerHTML);
			//alert(document.getElementById('navigace_ajax_0').offsetWidth);
		} else {
		  /*Problem se zadosti*/
			alert('Error with XMLHTTP instance. Please upgrade your browser. Error code: #01');
		}
	}
}
			    
function change_stav(KATEGORIE,ORDER){  
	if (document.getElementById('img_ajax_'+KATEGORIE).src == "http://www.zlasky.cz/images/design/strom_minus.gif"){
	  //alert("minus");
		document.getElementById('navigace_ajax_'+KATEGORIE).innerHTML = '';
		document.getElementById('navigace_ajax_'+KATEGORIE).style.display = 'none';
		//alert(document.getElementById('navigace_ajax_'+KATEGORIE).outerHTML);
		document.getElementById('img_ajax_'+KATEGORIE).src = 'http://www.zlasky.cz/images/design/strom_plus.gif';
	} else {
	  //alert("plus");
		document.getElementById('img_ajax_'+KATEGORIE).src = 'http://www.zlasky.cz/images/design/strom_minus.gif';
		//document.getElementById('navigace_ajax_'+KATEGORIE).innerHTML = '<span style="color: red;">&nbsp;&nbsp;&nbsp;Loading ....</span><br/><br/>';
		document.getElementById('navigace_ajax_'+KATEGORIE).innerHTML = '<span style="padding: 0px 0px 0px 15px;"><img src="/images/design/ajax-loader.gif" /></span><br/>';
		vytvoritZadost('/tree_menu2.php?kat='+KATEGORIE+'&order='+ORDER, 'navigace_ajax_'+KATEGORIE);
		document.getElementById('navigace_ajax_'+KATEGORIE).style.display = 'block';
	}
	return false;
}