function help_navigacia() {

	asirka = 499; //screen.availWidth;
	avyska = screen.availHeight * 0.92;
	x = screen.width - asirka * 1.02
	y = 0; // screen.height * 0.15;
	
	window.open("/help.php", "", "left="+x+",top="+y+",width="+asirka+",height="+avyska+",scrollbars=yes,resizable=yes");
}
// ----------------
// zobrazi velke foto v schovanom DIV-e
function show(cesta, akcia) {
	var obj
	
	if (akcia == 1) {
		obj = document.getElementById('foto_velke')
		obj.style.display = 'block';
		obj = document.getElementById('close')
		obj.style.display = 'block';
		obj = document.getElementById('img')
		obj.style.display = 'block';
		obj.src = cesta;

	} else {
		obj = document.getElementById('foto_velke')
		obj.style.display = 'none'
		obj = document.getElementById('close')
		obj.style.display = 'none'
		obj = document.getElementById('img')
		obj.style.display = 'none'
	}
}
// rozbalovanie horneho menu
function show_menu(obj, show) {
	var aaa
	aaa = document.getElementById('podmenu' + obj)
	if (show == 1) {
		aaa.style.display = 'block'
	} else {
		aaa.style.display = 'none'
	}
}

// funkcia skryje v IE formularovy prvok OPTION
function hide_option(obj, show) {
	var aaa
	aaa = document.getElementById(obj)
	if (show == 1) {
		aaa.style.visibility = 'hidden'
	} else {
		aaa.style.visibility = 'visible'
	}
}

// funkcia na otvaranie liniek odkazujucich na externu stranku do noveho okna
// osetrenie v standarde XHTML navalidneho tagu target="_blank"
function externalLinks() {

 if (!document.getElementsByTagName) return;
 
 var anchors = document.getElementsByTagName("a");
 
 for (var i=0; i<anchors.length; i++) {
 
   var anchor = anchors[i];
   
   if (anchor.getAttribute("href") &&
   
       anchor.getAttribute("rel") == "externe")
	   
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;