var Sitemenu = Class.create();
Sitemenu.prototype =
{
	initialize: function( menu_block_id, selected_class )
	{
		this.menu_block = $(menu_block_id);
		this.selected_class = selected_class;

		this.index = false;
		this.submenu_index = false;
		this.submenu = new Array();

		this.items = $A( this.menu_block.getElementsByTagName('li') );
		if( !this.items.length ) return false;

		for( i=0; i<this.items.length; i++ )
		{
			this.submenu[i] = ( $(this.items[i].id.replace('menu_', 'submenu_')) ) ? $(this.items[i].id.replace('menu_', 'submenu_')) : false;

			Event.observe( this.items[i], 'mouseover', this._over.bind(this, i) );
			Event.observe( this.items[i], 'mouseout', this._out.bind(this, i) );
		}
	},

	_over: function(index)
	{
		if(this.submenu[index]) this.submenu[index].removeClassName('hidden');

		this.index = index;
	},

	_out: function(index)
	{
		if(this.submenu[index]) this.submenu[index].addClassName('hidden');

		this.index = index;
	}
}