#glowny {
width: 780px;
height: 580px;
position:absolute; top:50%; left: 50%;
margin-top:-290px;
margin-left:-390px;
background-image: url(images/tlo.jpg);
}
#glowny {
width: 780px;
height: 580px;
position:absolute; top:50%; left: 50%;
margin-top:-290px;
margin-left:-390px;
background-image: url(images/tlo.jpg);
}