function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}



var show;
function showLAYER(){ 

if(show!=true){
idName='index';
  if(document.getElementById) // NN6,Mozilla,IE5,6用の処理  
    document.getElementById(idName).style.visibility = 'visible' 
    
  else if(document.all)       // IE4用の処理                 
    document.all(idName).style.visibility   = 'visible' 
    
  else if(document.layers)    // NN4用の処理                 
    document.layers[idName].visibility     = 'show' 

show=true;
}else{
idSet=new Array('index','cat01','cat02','cat03','cat04','cat0101','cat0102','cat0103','cat0103','cat0104','cat0105','cat0106','cat0107','cat0108','cat0201','cat0202','cat0203','cat0204','cat0205','cat0301','cat0302','cat0401','cat0402','cat0403','cat0404');
for(i=0 ;i<idSet.length;i++){
idName=idSet[i];
  if(document.getElementById) // NN6,Mozilla,IE5,6用の処理  
    document.getElementById(idName).style.visibility = 'hidden' 
    
  else if(document.all)       // IE4用の処理                 
    document.all(idName).style.visibility   = 'hidden' 
    
  else if(document.layers)    // NN4用の処理                 
    document.layers[idName].visibility     = 'hide' 
show=false;
}
}

}