var Aviso = new Class({
	Implements: [Events,Options],

	options: {
	  tempo: 1200,
	  alpha : 1,
	  onComplete : Class.empty
	},

	initialize: function(texto,options){
		this.setOptions(options);
		this.texto = texto;

		if($('aviso')){
		   this.el = new Element('div',{'class': 'bloco'});
		   this.el.set('html','<p>'+texto+'</p>').inject($('aviso'));
		}else{
		   new Element('div',{'id': 'aviso'}).inject(document.body,'top');
		   this.el = new Element('div',{'class': 'bloco'}).set('html','<p>'+texto+'</p>').inject($('aviso'),'top');
		}

		window.addEvent('scroll', this.move);
		this.move();
		this.el.setOpacity(this.options.alpha);
		this.show();
	},

  show: function(){
		var myEffect = new Fx.Morph(this.el, {duration: 350, transition: Fx.Transitions.Sine.easeOut});
		myEffect.start({
   		 'top': [5]
		});
      this.hide.delay(this.options.tempo+350, this);
   },

   hide: function(){
      if(this.el.getStyle('top').toInt()>-90){
			var myEffect = new Fx.Morph(this.el, {duration: 350, transition: Fx.Transitions.Sine.easeOut});
			myEffect.start({
   			'top': [-90],
				'opacity' : [this.options.alpha, 0]
			});
			myEffect.addEvent('onComplete',function(el){
        el.destroy();
      });
      }
      this.fireEvent('onComplete',[],250);
   },

   move : function(){
      var a = $('aviso');
      var n = a.getChildren().length;
      if(n==0) window.removeEvents('scroll');
      a.setStyles({
         top: ""+window.getScrollTop()+"px"
      });
   }
});