function show_group(group_array, active_group){
	for(group_id in group_array){
		groupStyle = document.getElementById(group_id).style;
		if(group_id == active_group){
			groupStyle.display = (groupStyle.display == 'none') ? '' : 'none';
		} else {
			groupStyle.display = 'none';
		}
	}
};