/**** onload event func ********/
function addLoadEvent(func){
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
		window.onload = func;
	}else{
		window.onload = function() {
			oldonload();
			func();
		}
	}
}
/**** onload event func ********/

function initNavigation(seq) {
	var nav = document.getElementById("gnb");
	nav.menu = new Array();
	nav.current = null;
	nav.menuseq = 0;
	navLen = nav.childNodes.length;
	
	allA = nav.getElementsByTagName("a");

//	alert(allA.item(0).childNodes[0].tagName);
//	alert(allA.item(0).childNodes[1].tagName);
//	alert(allA.item(0).childNodes[2].tagName);
//	alert(allA.item(6).childNodes.length);

	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;
			//alert(event.button);
			setTimeout(function () {
				if (nav.isOver == false) {
					if (nav.menu[seq]) {
						nav.menu[seq].onmouseover();	
					} else if(nav.current) {
					//	if( seq != 0)
						this.current.parentNode.className = this.current.parentNode.className.replace(" over","");						
						nav.current.parentNode.childNodes[0].childNodes[0].src = nav.current.parentNode.childNodes[0].childNodes[0].src.replace("_on","");
						if (nav.current.submenu)						
							nav.current.submenu.style.display = "none";
						nav.current = null;					
					}
				}
			}, 100000);
		}
	}

	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) {		
				//alert(nav.current.parentNode.childNodes[0].childNodes[0].tagName);
				if( seq !=0)
				nav.current.parentNode.className = nav.current.parentNode.className.replace(" over","");
				nav.current.parentNode.childNodes[0].childNodes[0].src = nav.current.parentNode.childNodes[0].childNodes[0].src.replace("_on","");
				if (nav.current.submenu)				
					nav.current.submenu.style.display = "none";
				nav.current = null;
			}
			
			if (nav.current != this) {
				if( seq !=0)
		this.submenu.parentNode.className +=" over";
		this.submenu.parentNode.childNodes[0].childNodes[0].src = this.submenu.parentNode.childNodes[0].childNodes[0].src.substr(0, 54) + "_on" + this.submenu.parentNode.childNodes[0].childNodes[0].src.substr(54, 4);
				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();



	//·Ñ¿À¹ö À̹ÌÁö ½ÃÀÛ//
	//function initNavigation1() {

	var arrUl = nav.getElementsByTagName("ul");
	var sub_nav = null;
	var srcs = null;
	
//	alert(arrUl.length);
//	alert(arrUl[0].childNodes.length);

	//¹Ùµð ÅÇ//

	for ( j=0; j<arrUl.length; j++ ) {
	
		if ( arrUl[j] )	{
			sub_nav = arrUl[j];
			srcs = sub_nav.getElementsByTagName("img");

			for(var i=0; i<srcs.length;i++)     {
				if (srcs[i].src.substr(srcs[i].src.length-6, 3) != "on.")
				{
					if(srcs[0].parentNode.tagName == "A")    {
						srcs[i].onmouseover = srcs[i].onfocus = function()    {
							var src_string = this.src;
							this.src = src_string.replace("off.","on.");
						}
						srcs[i].onmouseout = srcs[i].onblur = function()    {
							var src_string = this.src;
							this.src = src_string.replace("on.","off.");
						}
					}
				}
			}
		}

	}

	
	//·Ñ¿À¹ö À̹ÌÁö ³¡//
}



addLoadEvent(initNavigation);