_menu = function()
{
	this.fading = false;
	this.parent_subs = '';
	
	this.show_subs = function(parent_id,linkobject)
	{		
		this.linkobject 	= linkobject;
		this.show_sub_id 	= parent_id;
		this.get_parent_subs();
	}
	
	this.hide_all_subs = function()
	{
		var _subs = document.getElementsByTagName('DIV');
		
		
		for( var i = _subs.length-1 ; i > -1; i--)
		{
			if(_subs[i].id && (_subs[i].id != this.show_sub_id) && (_subs[i].id.substr(0,4) == 'sub_' || _subs[i].id.substr(0,4) == 'ddb_') && ( this.parent_subs.indexOf( _subs[i].id ) < 0 )  ) 
			{
				if(this.fading == true) new Effect.Fade(_subs[i], { duration: 0.2})
				else _subs[i].style.display = 'none';
			}
		}
		
		if(this.fading == true) setTimeout('_menu.appear()',200);
		else this.appear();
		
	}
	
	this.appear = function()
	{
		if(getE(this.show_sub_id)) 
		{
			if(this.fading == true) new Effect.Appear(getE(this.show_sub_id), { duration: 0.2});
			else getE(this.show_sub_id).style.display = '';
		}
	}
	
	this.get_parent_subs = function()
	{
			var _parent 		= this.linkobject.parentNode;
			var _parent_subs = true;

			this.parent_subs = '';	
				
			while(_parent_subs == true)
			{
				if(_parent)
				{
					if(_parent.id && _parent.id.substr(0,4) == 'sub_')	
					{
						this.parent_subs += _parent.id + ',';										
					}
				}				
				if(_parent.parentNode) _parent = _parent.parentNode;
				else _parent_subs = false;				
			}		
			setTimeout('_menu.hide_all_subs()',200);
	}
	
	this.clear_subs = function()
	{
		this.clearTO = setTimeout('_menu.clear_all()',600);
	}
	
	this.clear_all = function()
	{
		_menu.show_sub_id = 'NULL';
		_menu.parent_subs = 'NULL';	
		_menu.hide_all_subs();
	}
	
	this.clear_timeout = function()
	{
		clearTimeout(this.clearTO);
	}
	
	
}

_menu = new _menu();