var menuKey = ['top', 'bbs', 'event','sns','about','members','blog','xxx','database','secret'];
function menuinit(){
	if(document.images){
		for(var i = 0; i < menuKey.length; i++){
			var $key = menuKey[i];
			var $num = get_menukey(i);
			isrc['menu_' + $key] = "/images/menu_over_" + $num + ".gif";
			rsrc['menu_' + $key] = "/images/menu_" + $num + ".gif";
			
			( new Image() ).src = isrc['menu_' + $key];
			( new Image() ).src = rsrc['menu_' + $key];
			var im = document.getElementById('menu_' + $key);
			if(cmenu == $key){
				switch(i){
					case 3:
					case 6:
					case 7:
					im.src = isrc['menu_' + $key];
					break;
				default :
					im.src = "/images/menu2_" + $num + ".gif";
				}
			}else{
				im.onmouseover = overFunc;
				im.onmouseout = restorFunc;
			}
		}
		/*
		if(document.getElementById('mainbox').offsetHeight > 1050){
			var $bb = document.createElement('div');
			$bb.id = 'backface';
			$bb.innerHTML = '<img src="/images/shadow_left_face.gif" width="27" height="76" />';
			document.getElementById('innerbox').appendChild($bb);
		}*/
	}
}
function get_menukey($n){
	$n += 8;
	$n = $n.toString();
	while($n.length<2){
		$n = '0' + $n;
	}
	return $n;
}
function overFunc(e){
	if(!e) {
		e = window.event;
		var im = e.srcElement;
	}else{
		var im = e.target;
	}
	im.src = isrc[im.id];
}
function restorFunc(e){
	if(!e) {
		e = window.event;
		var im = e.srcElement;
	}else{
		var im = e.target;
	}
	im.src = rsrc[im.id];
}

var isrc = new Object();
var rsrc = new Object();

function getCookie(name){
	var search = name + '=';
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search);
		if (offset != -1){
			offset += search.length;
			end     = document.cookie.indexOf(';',offset);
			if(end == -1) end = document.cookie.length;
			return window['decodeURI'] != null ? decodeURI(document.cookie.substring(offset,end)) : document.cookie.substring(offset,end);
		}
	}
	return null;
}
function setCookie($key, $val){
	if(window['encodeURI'] != null) $val = encodeURI($val);
	var $d = new Date();
	$d.setTime($d.getTime() + 3 * 30 * 24 * 60 * 60 * 1000);
	$expire = $d.toGMTString();
	document.cookie = $key + '=' + $val + ';expires=' + $expire + ';';
}