/*
	layer-show hide
*/

function MM_findObj(n, d) { //v4.0
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 && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
var i,p,v,obj,args=MM_showHideLayers.arguments;
for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
obj.visibility=v; }
}

/*
	btn_top
*/

	//-------------------------------------------------------
	// 전역 변수 정의
	//-------------------------------------------------------
	var defaultPositionTop = 500;		// 초기 위치 (상단)
	var defaultPositionLeft = 820;		// 초기 위치 (왼쪽)
	var scrollSpeed = 15;				// 스크롤 속도
	var topGap = 10;					// 스크롤 됬을때 브라우져 위쪽과의 간격
	var menu = null;
	
	
	//-------------------------------------------------------
	// 메뉴를 슬라이딩 시킨다
	//-------------------------------------------------------
	function slidingMenu() {
		if (menu == null)
			menu = document.all.scrollmenu;
		
		var scrollTop = document.body.scrollTop;
		var startPosition = parseInt(menu.style.top);
		var endPosition = (defaultPositionTop >= scrollTop) ? defaultPositionTop : scrollTop + topGap;
		var scrollAmount = 0;
		
		// 스크롤 시키자!
		if (startPosition != endPosition) {
			scrollAmount = Math.ceil(Math.abs(endPosition - startPosition) / 15);
			menu.style.top = parseInt(menu.style.top, 10) + ( (endPosition < startPosition) ? -scrollAmount : scrollAmount);

			setTimeout("slidingMenu();", scrollSpeed);
			window.onscroll = null;
		} else {
			window.onscroll = slidingMenu;
		}
	}
	
	
	//-------------------------------------------------------
	// 메뉴 위치 초기화
	//-------------------------------------------------------
	function initSlidingMenu() {
		menu = document.all.tblMenu;
		defaultPositionTop = parseInt(menu.style.top, 10);
		defaultPositionLeft = parseInt(menu.style.left, 10);
	}
	
	
	//-------------------------------------------------------
	// 스크롤이 될때 메뉴 슬라이딩을 발동시키자!
	//-------------------------------------------------------
	window.onscroll = slidingMenu;