a#btn1
{
  width: 198px;
  height: 72px;
  display: block;
  float: left;
  background-image: url("../image/historieS.png");
  background-repeat: no-repeat;
}

a#btn1:hover
{
  background-image: url("../image/historieB.png");
  background-repeat: no-repeat;

}

a#btn2
{
  width: 198px;
  height: 72px;
  display: block;
  float: left;
  background-image: url("../image/spustTestMenuB.png");
  background-repeat: no-repeat;
}

a#btn2:hover
{
  background-image: url("../image/spustTestMenuS.png");
  background-repeat: no-repeat;
}

a#btn3
{
  width: 198px;
  height: 72px;
  display: block;
  float: left;
  background-image: url("../image/kontaktS.png");
  background-repeat: no-repeat;
}

a#btn3:hover
{
  background-image: url("../image/kontaktB.png");
  background-repeat: no-repeat;
}