.srodek{
  position:relative;
  width:780px;
  left:50%;
  margin-left:-390px;
}

.top{
  clear:both;
  width:780px;
  height:218px;
  background-image:url('../images/top.jpg');
}

.menu{
  width:780px;
  height:27px;
  background-image:url('../images/menu2.jpg');
}

.opis{  
  float:left;
  width:560px;
}

.bottom{ 
  clear:both;
  width:780px;
  height:41px;
  background-image:url('../images/bottom.jpg');
}