// ナビゲーション画像読込み
////////////////////////////////////////////////////////////////////////////////
function LoadNavi(depth){
	var root_path = "";
	for(var i = 1 ; i < depth ; i++){
		root_path += "../";
	}
	
	var navi_name    = new Array();
	    navi_name[0] = "intro";
	    navi_name[1] = "act";
	    navi_name[2] = "book";
	    navi_name[3] = "mail";
	    navi_name[4] = "intro2";
	    navi_name[5] = "act2";
	    navi_name[6] = "book2";
	    navi_name[7] = "mail2";
	    navi_name[8] = "link";
	    navi_name[9] = "intro3";
	    navi_name[10] = "intro4";
	    navi_name[11] = "mail3";
	    navi_name[12] = "mail4";
	    navi_name[13] = "guide";
	
	navi_src   = new Array();
	navi_src_r = new Array();
	
	for(var i = 0 ; i < navi_name.length ; i++){
		navi_src[navi_name[i]]       = new Image();
		navi_src[navi_name[i]].src   = root_path + "images/navi_" + navi_name[i] + ".gif";
		
		navi_src_r[navi_name[i]]     = new Image();
		navi_src_r[navi_name[i]].src = root_path + "images/navi_" + navi_name[i] + "_r.gif";
	}
}





// ナビゲーションロールオーバー
////////////////////////////////////////////////////////////////////////////////
function ChangeNavi(name,over){
	if(over){
		document.images[name].src = navi_src_r[name].src;
	}else{
		document.images[name].src = navi_src[name].src;
	}
}