var active_item = false;

function showFactoryItem(factory) {
    
    if (active_item == factory) {
        document.getElementById(active_item).style.display = "none";
        active_item = false;
    } else if (active_item != false) {
        document.getElementById(active_item).style.display = "none";
        try {
            document.getElementById(factory).style.display = "block";
        } catch (e) {		
        }
        active_item = factory;
	} else {
        try {
            document.getElementById(factory).style.display = "block";
        } catch (e) {		
        }	
        active_item = factory;
	}
	

}            

function hideFactoryItem(factory) {
    

}