var Categories = Class.create();
Categories.prototype = {
	initialize: function( categories ) {
		this._categories = categories;
		//this.showCategories(this._categories[0]);		
	},
	hideCategories: function() {
		for(i = 0; i < this._categories.length; i++ ) {
			Element.Methods.hide(this._categories[i]);	
		}
	},
	showCategories: function(categorie) {
		this.hideCategories();
		Element.Methods.show(categorie);
	}
}