var current_dir_id;

function preload(imgs){
 for(var i = 0; i < imgs.length; i++){
   var imgObj = new Image();
   imgObj.src = imgs[i];
 }
}

preload(["/img/common/menu/00_.gif","/img/common/menu/01_.gif","/img/common/menu/01_01_.gif","/img/common/menu/01_02_.gif","/img/common/menu/01_03_.gif","/img/common/menu/02_.gif","/img/common/menu/02_01_.gif","/img/common/menu/02_02_.gif","/img/common/menu/02_03_.gif","/img/common/menu/03_.gif","/img/common/menu/03_01_.gif","/img/common/menu/03_02_.gif","/img/common/menu/04_.gif","/img/common/menu/04_01_.gif","/img/common/menu/04_02_.gif","/img/common/menu/04_03_.gif","/img/common/menu/04_04_.gif","/img/common/menu/05_.gif"]);

function menu_init(list){
	var elm;
	elm = document.getElementById(list);
	//elm.style.visibility  = 'hidden';
	elm.style.display  = 'none';
}

function current_dir(id){
	var img_id;
	img_id = 'list' + id;

	img = document.getElementById(img_id);
	img.src='/img/common/menu/'+id+'_current.gif';
	current_dir_id = id;
}

function show_list(img_id,img_name,list){

	if(list != null){
		var elm;
		elm = document.getElementById(list);
		//elm.style.visibility  = 'visible';
		elm.style.display  = 'block';

	}

	var img;
	img = document.getElementById(img_id);
	//img.style.visibility  = 'visible';
	img.style.display  = 'block';

	if(current_dir_id != img_name){
		img.src='/img/common/menu/'+img_name+'_.gif';
	}

}

function hide_list(img_id,img_name,list){

	if(list != null){
		var elm;
		elm = document.getElementById(list);
		//elm.style.visibility  = 'hidden';
		elm.style.display  = 'none';
	}

	var img;
	img = document.getElementById(img_id);
	//img.style.visibility  = 'visible';
	img.style.display  = 'block';

	if(current_dir_id != img_name){
		img.src='/img/common/menu/'+img_name+'.gif';
	}
}

function menu_focus(obj,img_name){
	obj.src='/img/common/menu/'+img_name+'_.gif';
}

function menu_blur(obj,img_name){
	obj.src='/img/common/menu/'+img_name+'.gif';
}

function op_focus(obj){
	obj.src='/img/common/common_bt1_o.jpg';
}

function op_blur(obj){
	obj.src='/img/common/common_bt1.jpg';
}