var iex = document.all;
var ns4 = document.layers;
var ns6 = !document.all && document.getElementById; 

var lastmenu;
var navigace_sipka = new Image();
var navigace_sipka_dolu = new Image();

function getSub(name) {
	if (iex) return document.all["submenu_" + name]; else
	if (ns6) return document.getElementById("submenu_" + name);
}

function getSub2(name) {
	if (iex) return document.all["sekce_" + name]; else
	if (ns6) return document.getElementById("sekce_" + name);
}

function closemenu() {
	if (lastmenu) {
		getSub(lastmenu).style.display = "none";
		document.images["navigace_sipka_" + lastmenu].src = navigace_sipka.src;
	}
}

function closemenuUver() {
	if (lastmenu) {
		getSub(lastmenu).style.display = "none";
		//document.images["navigace_sipka_" + lastmenu].src = navigace_sipka.src;
	}
}

function switchmenu(name) {
	layer = getSub(name);
	if (layer) {
		closemenu();
		layer.style.display = "block";
		document.images["navigace_sipka_" + name].src = navigace_sipka_dolu.src;
		lastmenu = name;
	}
}

function switchmenuUver(name) {
	layer = getSub(name);
	layer2 = getSub2(name);
	if (layer) {
		closemenuUver();
		layer.style.display = "block";
		
		document.getElementById("sekce_" + name).style.color = "#FFAA00";
		//document.images["navigace_sipka_" + name].src = navigace_sipka_dolu.src;
		lastmenu = name;
	}
	else if (layer2) {
	
	document.getElementById("sekce_" + name).style.color = "#FFAA00";

}

}

function switchmenuTrumf(name) {
	layer = getSub(name);
	layer2 = getSub2(name);
	if (layer) {
		closemenuUver();
		layer.style.display = "block";
		
		//document.getElementById("sekce_" + name).style.color = "#FFAA00";
		//document.images["navigace_sipka_" + name].src = navigace_sipka_dolu.src;
		lastmenu = name;
	}
	else if (layer2) {
	
	//document.getElementById("sekce_" + name).style.color = "#FFAA00";

}

}



function redirect(url) {
	window.location.href = url;
}