var easySlider = new Class({



	initialize: function(params){

		this.items = params.items;

		this.mode = params.mode || 'horizontal';

		this.modes = {horizontal:['left','width'], vertical:['top','height']};

		this.size = params.size || 240;

		this.box = params.box.setStyle(this.modes[this.mode][1],(this.size*this.items.length)+'px');

		this.button_event = params.button_event || 'click';

		this.handle_event = params.handle_event || 'click';

		this.onWalk = params.onWalk || null;

		this.currentIndex = null;

		this.previousIndex = null;

		this.nextIndex = null;

		this.interval = params.interval || 5000;

		this.autoPlay = params.autoPlay || false;

		this._play = null;

		this.handles = params.handles || null;

		if(this.handles){

			this.addHandleButtons(this.handles);

		}

		this.buttons = {

			previous: [],

			next: [],

			play: [],

			playback: [],

			stop: []

		};

		if(params.addButtons){

			for(var action in params.addButtons){

				this.addActionButtons(action, $type(params.addButtons[action])=='array' ? params.addButtons[action] : [params.addButtons[action]]);

			}

		}

		this.fx = new Fx.Tween(this.box,$extend((params.fxOptions||{duration:500,wait:false}),{property:this.modes[this.mode][0]}));

		this.walk((params.startItem||0),true,true);

	},



	addHandleButtons: function(handles){

		for(var i=0;i<handles.length;i++){

			handles[i].addEvent(this.handle_event,this.walk.bind(this,[i,true]));

		}

	},



	addActionButtons: function(action,buttons){

		for(var i=0; i<buttons.length; i++){

			switch(action){

				case 'previous': buttons[i].addEvent(this.button_event,this.previous.bind(this,[true])); break;

				case 'next': buttons[i].addEvent(this.button_event,this.next.bind(this,[true])); break;

				case 'play': buttons[i].addEvent(this.button_event,this.play.bind(this,[this.interval,'next',false])); break;

				case 'playback': buttons[i].addEvent(this.button_event,this.play.bind(this,[this.interval,'previous',false])); break;

				case 'stop': buttons[i].addEvent(this.button_event,this.stop.bind(this)); break;

			}

			this.buttons[action].push(buttons[i]);

		}

	},



	previous: function(manual){

		this.walk((this.currentIndex>0 ? this.currentIndex-1 : this.items.length-1),manual);

	},



	next: function(manual){

		this.walk((this.currentIndex<this.items.length-1 ? this.currentIndex+1 : 0),manual);

	},



	play: function(interval,direction,wait){

		this.stop();

		if(!wait){

			this[direction](false);

		}

		this._play = this[direction].periodical(interval,this,[false]);

	},



	stop: function(){

		$clear(this._play);

	},



	walk: function(item,manual,noFx){

		if(item!=this.currentIndex){

			this.currentIndex=item;

			this.previousIndex = this.currentIndex + (this.currentIndex>0 ? -1 : this.items.length-1);

			this.nextIndex = this.currentIndex + (this.currentIndex<this.items.length-1 ? 1 : 1-this.items.length);

			if(manual){

				this.stop();

			}

			if(noFx){

				this.fx.cancel().set((this.size*-this.currentIndex)+'px');

			}else{

				this.fx.start(this.size*-this.currentIndex);

			}

			if(manual && this.autoPlay){

				this.play(this.interval,'next',true);

			}

			if(this.onWalk){

				this.onWalk((this.items[this.currentIndex] || null), (this.handles && this.handles[this.currentIndex] ? this.handles[this.currentIndex] : null));

			}

		}

	}

	

});