function initNavigation(seq, menuid) {
	if(!menuid)
		var nav = document.getElementById("gnbmenu");
	else
		var nav = document.getElementById(menuid);

	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);
							if(menuImg.tagName == "IMG") {
								menuImg.src = menuImg.src.replace("_on.gif", ".gif");
							}
							if (nav.current.submenu) {
								nav.current.submenu.style.display = "none";
							}
							nav.current = null;
						}

					}
				}
			}, 1000);
		}
	}

	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);

		if (navAnchor.submenu) {
			navAnchor.submenu.style.display = "none";
		}

		navAnchor.onmouseover = navAnchor.onfocus = function () {
			if (nav.current) {
				menuImg = nav.current.childNodes.item(0);

				if(menuImg.tagName == "IMG") {
					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);
				if(menuImg.tagName == "IMG") {
					menuImg.src = menuImg.src.replace("_on.gif", ".gif");
					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();

	/* submenu img rollover */
	var subnavLen = nav.getElementsByTagName("ul").length;
	for(i=0; i < subnavLen; i++) {

		var subnav =  nav.getElementsByTagName("ul").item(i).childNodes;
		for(s = 0; s < subnav.length; s++) {

			var subnavItem = subnav.item(s);
			if (subnavItem.tagName != "LI")
				continue;

			subnavAnchor = subnavItem.getElementsByTagName("img").item(0);

			if(subnav.item(s).getElementsByTagName("a").item(0)) {
				subnav.item(s).getElementsByTagName("a").item(0).onmouseover = subnav.item(s).getElementsByTagName("a").item(0).onfocus = function () {

					menuImg = this.childNodes.item(0);

					if(menuImg.tagName == "IMG") {
						menuImg.src = menuImg.src.replace("_on.gif", ".gif");
						menuImg.src = menuImg.src.replace(".gif", "_on.gif");
					}
					else {
						this.className += " on";
					}
					nav.isOver = true;
				}

				subnav.item(s).getElementsByTagName("a").item(0).onmouseout = subnav.item(s).getElementsByTagName("a").item(0).onblur = function () {
					menuImg = this.childNodes.item(0);

					if(menuImg.tagName == "IMG") {
						menuImg.src = menuImg.src.replace("_on.gif", ".gif");
					}
					else {
						if(this.className) {
							this.className = this.className.replace(" on", "");
						}
					}

					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);
									if(menuImg.tagName == "IMG") {
										menuImg.src = menuImg.src.replace("_on.gif", ".gif");
									}
									else {
										if(this.className) {
											this.className = this.className.replace(" on", "");
										}
									}

									if (nav.current.submenu) {
										nav.current.submenu.style.display = "none";
									}
									nav.current = null;
								}

							}
						}
					}, 1000);
				}

			}
		}
	}
	
	/* end submenu img rollover */
}


/* aside menu
-----------------------------------------------*/
function menuOver() {
	this.getElementsByTagName("img").item(0).src = this.getElementsByTagName("img").item(0).src.replace(".gif", "_on.gif");
	//this.src = this.src.replace(".gif", "_on.gif");
}
function menuOut() {
	this.getElementsByTagName("img").item(0).src = this.getElementsByTagName("img").item(0).src.replace("_on.gif", ".gif");
	//this.src = this.src.replace("_on.gif", ".gif");
}

/* www.rrl.go.kr submenu */
function initSubmenu(depth1, depth2, depth3) {
	var selectDepth1 = "sMenu" + depth1 + "-" + depth2;
	var selectDepth2 = "sMenu" + depth1 + "-" + depth2 + "-" + depth3;

	var nav = document.getElementById("asideMenu");
	var menuEl = nav.getElementsByTagName("li");
	
	for(i = 0; i < menuEl.length; i++) {
		
		if (menuEl.item(i).id == selectDepth1) {
			
			if(menuEl.item(i).getElementsByTagName("img").item(0)) {
				menuEl.item(i).getElementsByTagName("img").item(0).src = menuEl.item(i).getElementsByTagName("img").item(0).src.replace(".gif", "_on.gif");
			}
			if (menuEl.item(i).getElementsByTagName("ul").item(0)) {
				menuEl.item(i).getElementsByTagName("ul").item(0).style.display = "";
			}
		}else{
			if(menuEl.item(i).getElementsByTagName("img").item(0)) {
				menuEl.item(i).getElementsByTagName("img").item(0).src = menuEl.item(i).getElementsByTagName("img").item(0).src.replace("_on.gif", ".gif");
			}
			if (menuEl.item(i).getElementsByTagName("ul").item(0)) {
				menuEl.item(i).getElementsByTagName("ul").item(0).style.display = "none";
			}
		}
		
		if(menuEl.item(i).id == selectDepth2){
			menuEl.item(i).className = "on";
		}else{
			menuEl.item(i).className = "";
		}
		
	}
}


function menu_onoff(sel){
	sel_div = document.getElementById(sel);
	if(sel_div.style.display=="none"){
		sel_div.style.display="";
	}else{
		sel_div.style.display="none";
	}
}