var BrowserName = navigator.appName;
	var BrowserVer  = parseInt(navigator.appVersion);

	if (	(BrowserName == "Netscape" && BrowserVer >= 3) ||
		(BrowserName == "Microsoft Internet Explorer" && BrowserVer >= 4)  )
		Browser = "v3"
	else
		Browser = "v0";

	if (Browser == "v3")
	{

	var root_dir = "_grafika/";

	aoff = new Image();
	boff = new Image();
	coff = new Image();
	doff = new Image();
	eoff = new Image();
	foff = new Image();
	goff = new Image();
	homeoff = new Image();

	aoff.src = root_dir + "a_kwadrat_off.gif";
	boff.src = root_dir + "b_kwadrat_off.gif";
	coff.src = root_dir + "c_kwadrat_off.gif";
	doff.src = root_dir + "d_kwadrat_off.gif";
	eoff.src = root_dir + "e_kwadrat_off.gif";
	foff.src = root_dir + "f_kwadrat_off.gif";
	goff.src = root_dir + "g_kwadrat_off.gif";
	homeoff.src = root_dir + "home_s.gif";
		
	aon = new Image();
	bon = new Image();
	con = new Image();
	don = new Image();
	eon = new Image();
	fon = new Image();
	gon = new Image();
	homeon = new Image();

	aon.src = root_dir + "a_kwadrat_on.gif";
	bon.src = root_dir + "b_kwadrat_on.gif";
	con.src = root_dir + "c_kwadrat_on.gif";
	don.src = root_dir + "d_kwadrat_on.gif";
	eon.src = root_dir + "e_kwadrat_on.gif";
	fon.src = root_dir + "f_kwadrat_on.gif";
	gon.src = root_dir + "g_kwadrat_on.gif";
	homeon.src = root_dir + "home.gif";

	}


	function on(Name)
	{
		if (Browser == "v3")
		{ onit = eval(Name + "on.src");
		  self.document.images[Name].src = onit; }
	}

	function off(Name)
	{
		if (Browser == "v3")
		{ notonit = eval(Name + "off.src");
	  	self.document.images[Name].src = notonit;	}
	}