function changeTree (obj,objcnt)
{
	var n = obj.id.substr (obj.id.lastIndexOf ("_") + 1, obj.id.length) * 1;
	for (i = 1; i < (objcnt + 1); i ++)
	{
		if (i != n)
		{
			if (document.getElementById("hlavnimenu_"+i))
			{
				document.getElementById ("hlavnimenu_" + i).className = 'menu';
				if (document.getElementById("submenu_"+i))
					document.getElementById ("submenu_" + i).className = "polozka schov";
			}
		}
	}
	if (obj.className == "menu")
	{
		obj.className = "otevrenapolozka";
		document.getElementById ("submenu_" + n).className = "polozka ukaz";
	}
	else
	{
		obj.className = "menu";
		document.getElementById ("submenu_" + n).className = "polozka schov";
	}
}