function ZobrazitPodmenu(id,uzelid)
{
	var element = document.getElementById(id);
	var trida = element.className;
	var uzel = document.getElementById(uzelid);

	if ( trida == "subtree-neviditelny" )
	{
		element.className = "subtree-viditelny"
		uzel.className = "uzel-minus"
	}
	if ( trida == "subtree-viditelny" ) 
	{
		element.className = "subtree-neviditelny"
		uzel.className = "uzel-plus"
	}
}