//初期設定

layerlist = new Array('layermenuplan','layermenuplan2','layermenudraft','layermenudraft2','layermenuexamination','layermenuexamination2','layermenuopinion','layermenuopinion2','layermenudeliberation','layermenudeliberation2','layermenureport','layermenureport2','layermenupresen','layermenupresen2');

preloadImageList = new Array('misc/images_index/index_bnr_world_on.gif','misc/images_index/index_bnr_techno_on.gif','misc/images_index/index_main_world.gif','misc/images_index/index_main_techno.gif');

//preloadImage
function preloadImage(){
 var preimage = new Array();
 for(i = 0 ; i < preloadImageList.length ; i++) {
  preimage[i] = new Image();
  preimage[i].src = preloadImageList[i];
 }
}

//**********************************************************************

//メニュー部レイヤ表示
function showLayer(layerName){

 if(document.layers)document.layers[layerName].visibility = 'show';
 if(document.all)document.all[layerName].style.visibility = 'visible';

}

//メニュー部レイヤ非表示
function hideLayer(layerName){
 if(document.layers)document.layers[layerName].visibility = 'hide';
 if(document.all)document.all[layerName].style.visibility = 'hidden';
}


//メニュー部レイヤ全て非表示
function clearAll() {
 if(document.layers){
  for(i = 0 ; i < layerlist.length ; i++) {
    document.layers[layerlist[i]].visibility = 'hide';
  }
 }
 if(document.all){
  for(i = 0 ; i < layerlist.length ; i++) {
    document.all[layerlist[i]].style.visibility = 'hidden';
  }
 }
}

//メニュー部レイヤ全て非表示
function clearAll2() {
 if(document.layers){
  for(i = 0 ; i < 2 ; i++) {
    document.layers[layerlist[i]].visibility = 'hide';
  }
 }
 if(document.all){
  for(i = 0 ; i < 2 ; i++) {
    document.all[layerlist[i]].style.visibility = 'hidden';
  }
 }

}