function setPng24(obj) {
	obj.width=obj.height=1;
	obj.className=obj.className.replace(/\bpng24\b/i,''); 
	obj.style.filter =
	"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');"
	obj.src='about:blank;';
	return '';
}

// 로그인 영역 배경 지우기
function erase_bg(num){
	if (num=='1'){
		document.login.email.style.backgroundImage='url(about:blank)';
	}else{
		document.login.passwd.style.backgroundImage='url(about:blank)';
	}
}

function show_category_list(layer_id){

	if(layer_id == 'sort_by_category'){
		document.getElementById('sort_by_category').style.display = "block";
		document.getElementById('sort_by_area').style.display = "none";
	}else{
		document.getElementById('sort_by_area').style.display = "block";
		document.getElementById('sort_by_category').style.display = "none";
	}
}

function toggleLayer(id) {
	try {
	var obj = document.getElementById(id);
	obj.style.display = (obj.offsetHeight == 0) ? "block" : "none";
	 } catch (e) {

	 }
	 return true;
}

function toggleCate(id , btn) {
	try {
		var obj = document.getElementById(id);
		var btn	 = document.getElementById(btn);

		if( obj.offsetHeight == 0){
			obj.style.display = "block";
			btn.src = '/town/images/button/btn_tree_close.gif';
		}
		else{
			obj.style.display = "none";
			btn.src = '/town/images/button/btn_tree_open.gif';
		}
	} 
	catch (e) {

	}
	return true;
}

function show_bbs(layer_id){
	if(layer_id == 'tab_image'){
		document.getElementById('tab_image').style.display = "block";
		document.getElementById('tab_bbs').style.display = "none";
		document.getElementById('tab_video').style.display = "none"
	}else if(layer_id == 'tab_bbs'){
		document.getElementById('tab_image').style.display = "none";
		document.getElementById('tab_bbs').style.display = "block";
		document.getElementById('tab_video').style.display = "none"
	}else{
		document.getElementById('tab_image').style.display = "none";
		document.getElementById('tab_bbs').style.display = "none";
		document.getElementById('tab_video').style.display = "block"
	}
}

function show_term(layer_id){
	if(layer_id == 'tab_week'){
		document.getElementById('tab_week').style.display = "block";
		document.getElementById('tab_month').style.display = "none";
	}else{
		document.getElementById('tab_week').style.display = "none";
		document.getElementById('tab_month').style.display = "block";
	}
}


function interest_category(layer_id){
	if(layer_id == 'interest_industry'){
		document.getElementById('interest_industry').style.display = "block";
		document.getElementById('interest_area').style.display = "none";
	}else{
		document.getElementById('interest_area').style.display = "block";
		document.getElementById('interest_industry').style.display = "none";
	}
}

function show_eventbbs(layer_id){
	if(layer_id == 'event_closing'){
		document.getElementById('event_closing').style.display = "block";
		document.getElementById('event_uptodate').style.display = "none";
		document.getElementById('event_popular').style.display = "none";
		document.getElementById('event_join').style.display = "none"
	}else if(layer_id == 'event_uptodate'){
		document.getElementById('event_closing').style.display = "none";
		document.getElementById('event_uptodate').style.display = "block";
		document.getElementById('event_popular').style.display = "none";
		document.getElementById('event_join').style.display = "none"
	}else if(layer_id == 'event_popular'){
		document.getElementById('event_closing').style.display = "none";
		document.getElementById('event_uptodate').style.display = "none";
		document.getElementById('event_popular').style.display = "block";
		document.getElementById('event_join').style.display = "none"
	}else{
		document.getElementById('event_closing').style.display = "none";
		document.getElementById('event_uptodate').style.display = "none";
		document.getElementById('event_popular').style.display = "none";
		document.getElementById('event_join').style.display = "block"
	}
}

/* 오늘의 타운랭킹 */
function show_ranking(layer_id){
	if(layer_id == 'rank_visitor'){
		document.getElementById('rank_visitor').style.display = "block";
		document.getElementById('rank_1chon').style.display = "none";
		document.getElementById('rank_board').style.display = "none"
	}else if(layer_id == 'rank_1chon'){
		document.getElementById('rank_visitor').style.display = "none";
		document.getElementById('rank_1chon').style.display = "block";
		document.getElementById('rank_board').style.display = "none"
	}else{
		document.getElementById('rank_visitor').style.display = "none";
		document.getElementById('rank_1chon').style.display = "none";
		document.getElementById('rank_board').style.display = "block"
	}
}

function show_premium(layer_id){
	if(layer_id == 'event_on'){
		document.getElementById('event_on').style.display = "block";
		document.getElementById('event_off').style.display = "none"
	}else{
		document.getElementById('event_on').style.display = "none";
		document.getElementById('event_off').style.display = "block"
	}
}


/* 방문자랭킹// 일간 주간 월간 급상승 */
function show_ranking_visitor(layer_id){
	if(layer_id == 'ranking_visitor_day'){
		document.getElementById('ranking_visitor_day').style.display = "block";
		document.getElementById('ranking_visitor_week').style.display = "none";
		document.getElementById('ranking_visitor_month').style.display = "none";
		document.getElementById('ranking_visitor_up').style.display = "none"
	}else if(layer_id == 'ranking_visitor_week'){
		document.getElementById('ranking_visitor_day').style.display = "none";
		document.getElementById('ranking_visitor_week').style.display = "block";
		document.getElementById('ranking_visitor_month').style.display = "none";
		document.getElementById('ranking_visitor_up').style.display = "none"
	}else if(layer_id == 'ranking_visitor_month'){
		document.getElementById('ranking_visitor_day').style.display = "none";
		document.getElementById('ranking_visitor_week').style.display = "none";
		document.getElementById('ranking_visitor_month').style.display = "block";
		document.getElementById('ranking_visitor_up').style.display = "none"
	}else{
		document.getElementById('ranking_visitor_day').style.display = "none";
		document.getElementById('ranking_visitor_week').style.display = "none";
		document.getElementById('ranking_visitor_month').style.display = "none";
		document.getElementById('ranking_visitor_up').style.display = "block"
	}
}


/* 투데이 타운 */
function today_town(layer_id){
	if(layer_id == 'today_town_star'){
		document.getElementById('today_town_star').style.display = "block";
		document.getElementById('today_town_tomem').style.display = "none";
	}else{
		document.getElementById('today_town_star').style.display = "none";
		document.getElementById('today_town_tomem').style.display = "block"
	}
}

/* 아이템 관리 */
function admin_item(layer_id){
	if(layer_id == 'item_gift'){
		document.getElementById('item_gift').style.display = "block";
		document.getElementById('brandskin').style.display = "none";
		document.getElementById('keyword').style.display = "none"
	}else if(layer_id == 'brandskin'){
		document.getElementById('item_gift').style.display = "none";
		document.getElementById('brandskin').style.display = "block";
		document.getElementById('keyword').style.display = "none"
	}else{
		document.getElementById('item_gift').style.display = "none";
		document.getElementById('brandskin').style.display = "none";
		document.getElementById('keyword').style.display = "block"
	}
}

/* 메인 배너 */
function showbanner(layer_id){
	if(layer_id == 'banner1'){
		document.getElementById('banner1').style.display = "block";
		document.getElementById('banner2').style.display = "none";
		document.getElementById('banner3').style.display = "none"
	}else if(layer_id == 'banner2'){
		document.getElementById('banner1').style.display = "none";
		document.getElementById('banner2').style.display = "block";
		document.getElementById('banner3').style.display = "none"
	}else{
		document.getElementById('banner1').style.display = "none";
		document.getElementById('banner2').style.display = "none";
		document.getElementById('banner3').style.display = "block"
	}
}

/* 방문자랭킹// 일간 주간 월간 급상승 */
function ranking_cate(layer_id){
	if(layer_id == 'cate_visitor'){
		document.getElementById('cate_visitor').style.display = "block";
		document.getElementById('cate_1chon').style.display = "none";
		document.getElementById('cate_bbs').style.display = "none";
		document.getElementById('cate_bookmark').style.display = "none"
	}else if(layer_id == 'cate_1chon'){
		document.getElementById('cate_visitor').style.display = "none";
		document.getElementById('cate_1chon').style.display = "block";
		document.getElementById('cate_bbs').style.display = "none";
		document.getElementById('cate_bookmark').style.display = "none"
	}else if(layer_id == 'cate_bbs'){
		document.getElementById('cate_visitor').style.display = "none";
		document.getElementById('cate_1chon').style.display = "none";
		document.getElementById('cate_bbs').style.display = "block";
		document.getElementById('cate_bookmark').style.display = "none"
	}else{
		document.getElementById('cate_visitor').style.display = "none";
		document.getElementById('cate_1chon').style.display = "none";
		document.getElementById('cate_bbs').style.display = "none";
		document.getElementById('cate_bookmark').style.display = "block"
	}
}

/* 스크랩 이벤트 */
function scrap_select(layer_id){
	if(layer_id == 'whole'){
		document.getElementById('whole').style.display = "block";
		document.getElementById('album').style.display = "none";
		document.getElementById('catalog').style.display = "none";
		document.getElementById('board').style.display = "none"
	}else if(layer_id == 'album'){
		document.getElementById('whole').style.display = "none";
		document.getElementById('album').style.display = "block";
		document.getElementById('catalog').style.display = "none";
		document.getElementById('board').style.display = "none"
	}else if(layer_id == 'catalog'){
		document.getElementById('whole').style.display = "none";
		document.getElementById('album').style.display = "none";
		document.getElementById('catalog').style.display = "block";
		document.getElementById('board').style.display = "none"
	}else{
		document.getElementById('whole').style.display = "none";
		document.getElementById('album').style.display = "none";
		document.getElementById('catalog').style.display = "none";
		document.getElementById('board').style.display = "block"
	}
}



//GNB 전체메뉴
function toggleGnbLayer(id) {
	try {
        var obj = document.getElementById(id);
        obj.style.display = (obj.style.display == "none") ? "block" : "none";
	} catch (e) {
	}
	return true;
}

//GNB 전체메뉴 아이콘
function ChangeGnbImg(gnblayer,aclass) {
	var gnbl = document.getElementById(gnblayer).style.display;
	var gclass = document.getElementById(aclass);
	if (gnbl=='block')
	{
		gclass.className='open';
	} else {
		gclass.className='';
	}
}

//GNB 전체메뉴 더보기
function SelectMenu(){
        document.getElementById("menu2_1").style.display = "none";
        document.getElementById("menu2").style.display = "block";
}

//캐릭터바꾸기
function toggleLayer(id) {
	try {
        var obj = document.getElementById(id);
        obj.style.display = (obj.style.display == "none") ? "block" : "none";
	} catch (e) {
	}
	return true;
}
<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
//-->

function chgGnbArrow(c2layer,imga) {
	var c2l = document.getElementById(c2layer).style.display;
	var arrow = document.getElementById(imga);
	if (c2l=='block')
	{
		arrow.src='http://c2img.cyworld.com/img/ko/section/ico_gnbNameDown.gif';
	} else {
		arrow.src='http://c2img.cyworld.co.kr/img/ko/section/ico_gnbName.gif';
	}
}