var CurrentMainMenuLayer = "";

function ViewMainLayer()
{
	document.getElementById('MainLayer1').style.display = "block";
	document.getElementById('MainLayer2').style.display = "block";
	document.getElementById('MainLayer3').style.display = "block";
	document.getElementById('MainLayer4').style.display = "block";
	document.getElementById('MainLayer5').style.display = "block";
	document.getElementById('gnb_bg').style.display = "block";
	document.getElementById('gnb_all').style.display = "none";
	document.getElementById('main_notice').style.display = "none";
	document.getElementById('gnb_start').focus();
}

function CloseMainLayer()
{
	document.getElementById('MainLayer1').style.display = "none";
	document.getElementById('MainLayer2').style.display = "none";
	document.getElementById('MainLayer3').style.display = "none";
	document.getElementById('MainLayer4').style.display = "none";
	document.getElementById('MainLayer5').style.display = "none";
	document.getElementById('gnb_bg').style.display = "none";
	document.getElementById('gnb_all').style.display = "block";
	document.getElementById('main_notice').style.display = "block";
	document.getElementById('gnb_all_btn').focus();
}

function mainTap()
{

	if(!document.getElementsByTagName) return false;
	if(!document.getElementById) return false;
	if(!document.getElementById("article_1") && !document.getElementById("article_2") && !document.getElementById("article_3")) return false;
	
	document.getElementById("article_1").style.display="none";
	document.getElementById("article_2").style.display="none";
	document.getElementById("article_3").style.display="none";	

	var mtab1=document.getElementById("tab_all");
	var mtab2=document.getElementById("tab_notice");
	var mtab3=document.getElementById("tab_event");
	var mtab4=document.getElementById("tab_news");

	var links1 = mtab1.getElementsByTagName("li");
	var links2 = mtab2.getElementsByTagName("li");
	var links3 = mtab3.getElementsByTagName("li");
	var links4 = mtab4.getElementsByTagName("li");
	
	//tab01
	links1[1].onclick = function(){			
		ViewMainTab(1);
		document.getElementById("a_notice").focus();
		return false;
	}
	links1[2].onclick = function(){			
		ViewMainTab(2);
		document.getElementById("a_event").focus();
		return false;
	}
	links1[3].onclick = function(){			
		ViewMainTab(3);
		document.getElementById("a_news").focus();
		return false;
	}
	
	
	//tab02
	links2[0].onclick = function(){			
		ViewMainTab(0);
		document.getElementById("a_all").focus();
		return false;
	}
	links2[2].onclick = function(){			
		ViewMainTab(2);
		document.getElementById("a_event").focus();
		return false;
	}
	links2[3].onclick = function(){			
		ViewMainTab(3);
		document.getElementById("a_news").focus();
		return false;
	}
	
	//tab03
	links3[0].onclick = function(){			
		ViewMainTab(0);
		document.getElementById("a_all").focus();
		return false;
	}
	links3[1].onclick = function(){			
		ViewMainTab(1);
		document.getElementById("a_notice").focus();
		return false;
	}
	links3[3].onclick = function(){			
		ViewMainTab(3);
		document.getElementById("a_news").focus();
		return false;
	}
	
	//tab04
	links4[0].onclick = function(){			
		ViewMainTab(0);
		document.getElementById("a_all").focus();
		return false;
	}
	links4[1].onclick = function(){			
		ViewMainTab(1);
		document.getElementById("a_notice").focus();
		return false;
	}
	links4[2].onclick = function(){			
		ViewMainTab(2);
		document.getElementById("a_event").focus();
		return false;
	}

}

function ViewMainTab(seq)
{	
	for(var i=0;i<=3;i++)
	{
		if(seq == i)
		{
			document.getElementById("article_"+i).style.display="block";
		}
		else
		{
			document.getElementById("article_"+i).style.display="none";
		}		
	}	
	return false;
}

function Main_GNB_Swap()
{	
	var gnb = new Array(5);
	var links =  new Array(5);
	gnb[0]=document.getElementById("MainLayer1");
	gnb[1]=document.getElementById("MainLayer2");
	gnb[2]=document.getElementById("MainLayer3");
	gnb[3]=document.getElementById("MainLayer4");
	gnb[4]=document.getElementById("MainLayer5");
	
	for(var i=0;i<5;i++)
	{
		links[i] = gnb[i].getElementsByTagName("img");
	}
	for(var i=0;i<gnb.length;i++)
	{
		for(var j=0;j<links[i].length;j++)
		{
			//alert(links[i][j]);
			links[i][j].onmouseover = links[i][j].onfocus = function(){
				this.src = this.src.substring(0,this.src.length-4) + "_r.gif";
			};
			
			links[i][j].onmouseout = links[i][j].onblur = function(){
				this.src = this.src.substring(0,this.src.length-6) + ".gif";
			};
		}
	}
}