window.addEvent('domready', function(){ 
	  var totIncrement		= 0;
	  var increment			= 212;
	  var maxRightIncrement	= increment*(-6);
	  var fx = new Fx.Style('slider-list', 'margin-left', {
				duration: 1000,
				transition: Fx.Transitions.Back.easeInOut,
				wait: true
	   });
	   
	   //-------------------------------------
	  // EVENTS for the button "previous"
	  if ($('previous') != null)
	  {
	      $('previous').addEvents({ 
              'click' : function(event){ 
		      if(totIncrement<0){
					    totIncrement = totIncrement+increment;
					    fx.stop()
					    fx.start(totIncrement);
				    }
			    }			  	  
          }); 
	 }
       //-------------------------------------
	  // EVENTS for the button "next"
	  if ($('next') != null)
	  {
  	      $('next').addEvents({ 
              'click' : function(event){ 
			     if(totIncrement>maxRightIncrement){
				     totIncrement = totIncrement-increment;
		    	    fx.stop()
				    fx.start(totIncrement);
			    }
              }		  		  
          })
      }
	 
});