var active_sub_navigation 	= null;
var active_navigation_link 	= null;

function toggle(id) 
{
	if(active_sub_navigation) {
		active_sub_navigation.style.display = 'none';
	}
	
	if(active_navigation_link) {
		active_navigation_link.style.color = '#000000';
	}
	
	var sub_navigation 	= document.getElementById('sub-navigation-' + id);
	var navigation_link = document.getElementById('navigation-link-' + id);
	
	if(sub_navigation != null) {
		sub_navigation.style.display 	= 'block';
		active_sub_navigation 	= sub_navigation;
	}
	
	navigation_link.style.color 	= '#FF0033';
	active_navigation_link 	= navigation_link;
	
	return true;
}