// JavaScript Document
window.addEvent('domready', function(){ 
	  var increment = 0;
	  var fx = new Fx.Style('myList', 'margin-left', {
				duration: 1000,
				transition: Fx.Transitions.Back.easeInOut,
				wait: true
	   });
	  $('siguiente').addEvents({ 
		  'click' : function(event){ 
			increment = increment +212;
			fx.stop()
			fx.start(increment);
		  }		  		  
	  }); 
  
	  $('anterior').addEvents({ 
		  'click' : function(event){ 
			increment = increment -212;
			fx.stop()
			fx.start(increment);
		  }		  		  
	  })
});