var f_krby_i = new Image();
f_krby_i.src = '/images/18.jpg';
var f_krby_o = new Image();
f_krby_o.src = '/images/12.jpg';

var f_stavby_i = new Image();
f_stavby_i.src = '/images/19.jpg';
var f_stavby_o = new Image();
f_stavby_o.src = '/images/13.jpg';

var f_kamenik_i = new Image();
f_kamenik_i.src = '/images/20.jpg';
var f_kamenik_o = new Image();
f_kamenik_o.src = '/images/14.jpg';

var l_krby_i = new Image();
l_krby_i.src = '/images/9t.jpg';
var l_krby_o = new Image();
l_krby_o.src = '/images/9.jpg';

var l_stavby_i = new Image();
l_stavby_i.src = '/images/10t.jpg';
var l_stavby_o = new Image();
l_stavby_o.src = '/images/10.jpg';

var l_kamenik_i = new Image();
l_kamenik_i.src = '/images/11t.jpg';
var l_kamenik_o = new Image();
l_kamenik_o.src = '/images/11.jpg';