.left_a1 a{ 
  background-image:url("../recipecategory/sukiyaki_kanto.jpg");
}
.right_a2 a{ 
  background-image:url("../recipecategory/sukiyaki_kansai.jpg");
}
.left_a3 a{ 
  background-image:url("../recipecategory/meja40a.jpg");
}
.right_a4 a{ 
  background-image:url("../recipecategory/meja56a.jpg");
}