var cSlider = Class.create({ 
	
	initialize: function(slider,demora) {		
		this.lame_slider = $(slider).getElementsByTagName('li');
		for(i=0;i<this.lame_slider.length;i++)
			if(i!=0) this.lame_slider[i].style.display = 'none';
		this.images_count = this.lame_slider.length - 1;		
		this.current_frame=0;

		this.updater=new PeriodicalExecuter(this.change.bind(this),demora);

	},
	
	change: function() {
		Effect.Fade(this.lame_slider[this.current_frame]);
		if (this.current_frame == this.images_count)
			this.current_frame = 0;
		else 
			this.current_frame++;
		Effect.Appear(this.lame_slider[this.current_frame]);		
	}
		
});