function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3)
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}
function MM_jumpMenu_blank(selObj,restore){ //v3.0
  eval("window.open='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function setPng24(obj) {
	var useragent = navigator.userAgent;
	
	if ((useragent.indexOf('MSIE 6')>0) && (useragent.indexOf('MSIE 7')==-1)){
		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='';
		return '';
	}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

/* 탭메뉴 토글 */
function tabNavToggle(num) {
	document.getElementById('tabNav01').style.display = "none";
	document.getElementById('tabNav02').style.display = "none";
	document.getElementById('tabNav03').style.display = "none";
	document.getElementById('tabNav0' + num).style.display = "block";
}

//서브메뉴 토글
/*var openMenuID="";	// 열려있는 ID를 저장함

function toggleSubMenu(idStr){
	mObj=document.getElementById(idStr);
	if(mObj){
		if (mObj.style.display=="none"){
			if(openMenuID){
				document.getElementById(openMenuID).style.display="none";
			}
			mObj.style.display="block";
			openMenuID=idStr;
		}else if (mObj.style.display=="block"){
			mObj.style.display="none";
			openMenuID="";
		}
	}
}
*/

// 서브메뉴 보기
var sMenu_launch = "";
function detailSubMenu(name)
{
	submenu = document.getElementById(name).style;
	if(sMenu_launch != submenu)
	{
		if(sMenu_launch != "")
		{
			sMenu_launch.display = "block";
		}
		submenu.display = "block";
		sMenu_launch = submenu;
	}
	else
	{
		submenu.display = "none";
		sMenu_launch = "";
	}
}

/*	글자확대축소 */	
var currentFontSize = 2;
 
function zoomUtil(state){
	var idx = currentFontSize;
	var arrFontSize = new Array();
	
	arrFontSize[0] = "9px";
	arrFontSize[1] = "11px";
	arrFontSize[2] = "12px";
	arrFontSize[3] = "13px";
	arrFontSize[4] = "14px";
	arrFontSize[5] = "15px";
	arrFontSize[6] = "16px";
	
	if(state == "plus"){		
		if(currentFontSize < 6 ){				
			idx = currentFontSize + 1;
			currentFontSize = idx;
		}
	}else if (state == "default"){
		idx = 2;
		currentFontSize = idx;
	}else if (state == "minus"){			
		if( currentFontSize >= 1){
			idx = currentFontSize - 1;
			currentFontSize = idx;
		}	
	}		
	
	if(navigator.userAgent.indexOf("MSIE") != -1){
		document.body.style.fontSize = arrFontSize[idx];
	}else{
		document.getElementsByTagName("BODY").style.fontSize = arrFontSize[idx];
	}
	
	return false;
}


String.prototype.toInteger = function() {
	return this.replace(/[^0-9]/g, '') * 1;
}

//퀵메뉴 스크립트
function followBanner(div_id, origin_top, limit_top, margin_top){
	var d, t, s, g, target_height;
	origin_top *= 1;
	limit_top *= 1;
	margin_top *= 1;
	
	d = document.getElementById(div_id);
	s = document.documentElement.scrollTop + "";
	
	target_height = s.toInteger() + margin_top;
	if(target_height < limit_top) {
		target_height = origin_top;
	}
	
	t = d.style.top.toInteger();
	
	if(t != target_height) {
		g = Math.ceil((t - target_height) / 5);
		if(g > 50) {
			g = 50;
		} else if (g < -50) {
			g = -50;
		}
		d.style.top = (t - g) + "px";
	}
	setTimeout("followBanner('"+div_id+"', '"+origin_top+"', '"+limit_top+"', '"+margin_top+"');", 1);
}

// gnb menu
function initNavigation(seq) {
	nav = document.getElementById("gnb");
	nav.menu = new Array();
	nav.current = null;
	nav.menuseq = 0;
	navLen = nav.childNodes.length;
	
	allA = nav.getElementsByTagName("a")
	for(k = 0; k < allA.length; k++) {
		allA.item(k).onmouseover = allA.item(k).onfocus = function () {
			nav.isOver = true;
		}
		allA.item(k).onmouseout = allA.item(k).onblur = function () {
			nav.isOver = false;
			setTimeout(function () {
				if (nav.isOver == false) {
					if (nav.menu[seq])
						nav.menu[seq].onmouseover();
					else if(nav.current) {
						menuImg = nav.current.childNodes.item(0);
						menuImg.src = menuImg.src.replace("_on.gif", ".gif");
						if (nav.current.submenu)
							nav.current.submenu.style.display = "none";
						nav.current = null;
					}
				}
			}, 500);
		}
	}

	for (i = 0; i < navLen; i++) {
		navItem = nav.childNodes.item(i);
		if (navItem.tagName != "LI")
			continue;

		navAnchor = navItem.getElementsByTagName("a").item(0);
		navAnchor.submenu = navItem.getElementsByTagName("ul").item(0);
		
		navAnchor.onmouseover = navAnchor.onfocus = function () {
			if (nav.current) {
				menuImg = nav.current.childNodes.item(0);
				menuImg.src = menuImg.src.replace("_on.gif", ".gif");
				if (nav.current.submenu)
					nav.current.submenu.style.display = "none";
				nav.current = null;
			}
			if (nav.current != this) {
				menuImg = this.childNodes.item(0);
				menuImg.src = menuImg.src.replace(".gif", "_on.gif");
				if (this.submenu)
					this.submenu.style.display = "block";
				nav.current = this;
			}
			nav.isOver = true;
		}
		nav.menuseq++;
		nav.menu[nav.menuseq] = navAnchor;
	}
	if (nav.menu[seq])
		nav.menu[seq].onmouseover();
}

// 탭 메뉴
function initTabMenu (tabContainerID)
{
	var tabContainer	= document.getElementById(tabContainerID);
	var tabAnchor		= tabContainer.getElementsByTagName("a");

	for (var i=0; i<tabAnchor.length; i++)
	{
		var thismenu = tabAnchor.item(i);

		thismenu.container	= tabContainer;
		thismenu.targetEl	= document.getElementById(tabAnchor.item(i).href.split("#")[1]);
		thismenu.targetEl.style.display = "none";
		thismenu.onclick = function ()
		{
			var currentmenu	= this.container.current;

			if (currentmenu!=this)
			{
				if (currentmenu)
				{
					currentmenu.targetEl.style.display = "none";
					currentmenu.className = "";
				}

				this.targetEl.style.display = "block";
				this.className	= "menu_on";
				this.container.current = this;
			}
			return false;			
			
		};

		if (!thismenu.container.first) { thismenu.container.first = thismenu; }
	}
	
	tabContainer.first.onclick();
}


// rollover
function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;