function premier(n) {
  for(var i = 1; i < 3; i++) {
    obj = document.getElementById('premier'+i);
    img = document.getElementById('premier_button'+i);
    if ( n == i ) {
      obj.style.display = "block";
      img.height = 24;
      img.src = "/images/main_notice_mea_1001_0"+i+"a.gif";    
    } else {
      obj.style.display = "none";
      img.height = 24;
      img.src = "/images/main_notice_mea_1001_0"+i+".gif";
    }
  }
}

function seabut(n) {
  for(var i = 1; i < 5; i++) {
    obj = document.getElementById('seabut'+i);
    img = document.getElementById('seabut_button'+i);
    if ( n == i ) {
      obj.style.display = "block";
      img.height = 29;
      img.src = "/images/main_seabut_button_0"+i+"a.gif";    
    } else {
      obj.style.display = "none";
      img.height = 29;
      img.src = "/images/main_seabut_button_0"+i+".gif";
    }
  }
}