function layer_view (layer_name, layer_display){
	if (layer_display == "view"){
		document.getElementById(layer_name).style.display = "block" ;
	} else {
		document.getElementById(layer_name).style.display = "none" ;
	}
}

function layer_swap (view_name, hide_name){
		document.getElementById(view_name).style.display = "block" ;
		document.getElementById(hide_name).style.display = "none" ;
}


function initToggle(tabContainer) {
	triggers = tabContainer.getElementsByTagName("a"); 

	for(i = 0; i < triggers.length; i++) { 
		if (triggers.item(i).href.split("#")[1])
			triggers.item(i).targetEl = document.getElementById(triggers.item(i).href.split("#")[1]);

		if (!triggers.item(i).targetEl)
			continue;

		triggers.item(i).targetEl.style.display = "none"; 
		triggers.item(i).onclick = function () { 
			if (tabContainer.current == this) {
				this.targetEl.style.display = "none";
				tabContainer.current = null; 
			} else {
				if (tabContainer.current) {
					tabContainer.current.targetEl.style.display = "none";
				} 
				this.targetEl.style.display = "block";
				tabContainer.current = this; 
			}
			return false;
		}
	}
} 


function gnb(a){
	var vName = 'menu'+a ;
	var mName = document.getElementById('menu_n'+a) ;
	layer_view (vName,'view');
	mName.src = mName.src.replace("off.gif", "on.gif");
}

function gnb_o(a){
	var vName = 'menu'+a ;
	var mName = document.getElementById('menu_n'+a) ;
	layer_view (vName,'hide');
	mName.src = mName.src.replace("on.gif", "off.gif");
}


function mainBigImgChange(cimg,a){ 
	document.getElementById('mainBigImg').src = cimg; 
	
	var m_t_Icon = document.getElementById('icon').getElementsByTagName('img');
	for (i=0 ;i<m_t_Icon.length ;i++ )
	{	if (i+1 == a)
			{m_t_Icon[i].src = m_t_Icon[i].src.replace("off.gif", "on.gif");}
			else 
			{m_t_Icon[i].src = m_t_Icon[i].src.replace("on.gif", "off.gif");}
	}

	// ¸ÞÀÎ »ó´Ü ¹è³Ê ¸Ê °ü·Ã 2011.8.2. Ãß°¡ - ¹é½Â¸í
	document.getElementById('mainBigImg').useMap = "#ctbmap" + a;
}


function curriculum_on(a){
	for (i=1 ;i<5 ;i++ )	{
		var cOn = "c_"+i+"on" ; 
		var cOff = "c_"+i+"off" ; 

		layer_view (cOn,'hide');
		layer_view (cOff,'view');
		if (i == a){layer_view (cOn,'view');layer_view (cOff,'hide');} 
	}
}