var menuContents = new Array();
var isOpened = new Array();

function chgBg(obj,color) {
	if (document.all || document.getElementById) obj.style.backgroundColor=color;
	else if (document.layers) obj.bgColor=color;
}

function menuvalt(num,newclass) {
    document.getElementById('menu_'+num).className=newclass;
}

function submenuvalt(num,newclass) {
	document.getElementById('sub_'+num).className=newclass;
}

function kepcsere(targetPic, sourcePic) {
	document.images[targetPic].src = eval(sourcePic + ".src");
}

function openMenu(menuLayerID) {
    document.getElementById(menuLayerID + '_layer').innerHTML = menuContents[menuLayerID];
	isOpened[menuLayerID] = true;
}

function closeMenu(menuLayerID) {
	document.getElementById(menuLayerID + '_layer').innerHTML = '';
	isOpened[menuLayerID] = false;
}

function clickMenu(menuLayer_ID,what) {
	menuLayerID= 'sub_' + menuLayer_ID;
	
    if(what=='change') {
		if (isOpened[menuLayerID] == true){
			closeMenu(menuLayerID);
		} else {
			openMenu(menuLayerID);
		}
	}
	
    if(what=='open'){
		openMenu(menuLayerID);
	} if(what=='close'){
		closeMenu(menuLayerID);
	}
}