var avScroll = new Class({

    options: {
		imgWidth: 0,
		scrollRange: 0,
		leftHandle: null,
		rightHandle: null,
		container: null,
		leftClicks: 0,
		rightClicks: 0,
		speed: 500		
	},
	
	initialize: function(options){
	this.setOptions(options)
	
		this.imgWidth = options['imgWidth'];
		this.scrollRange = options['scrollRange'];
		this.leftHandle = options['leftHandle'];
		this.rightHandle = options['rightHandle'];	
		this.container = $(options['container']);
		
		if($(options['ff'])){
			this.ff = $(options['ff']);
			$(this.ff).addEvent('click',this.fastForward.bindWithEvent(this));
		}
		if($(options['rw'])){
			this.rw = $(options['rw']);
			$(this.rw).addEvent('click',this.speedReverse.bindWithEvent(this));
		}
		
		this.leftClicks = 0;
		this.rightClicks = 0;
		this.speed = options['speed'];		
		$(this.leftHandle).addEvent('click',this.leftClick.bindWithEvent(this));
		$(this.rightHandle).addEvent('click',this.rightClick.bindWithEvent(this));
	},
	leftClick: function(){
		if(this.leftClicks > 0){
			var start= this.leftClicks * this.imgWidth;
			var end = ( this.leftClicks - 1 ) * this.imgWidth;
			$(this.container).effect('right',{ duration: this.speed, wait:true, transition:Fx.Transitions.Back.easeIn }).start(start,end);
			this.leftClicks--;
			setSliderNumberActivity();
		}		
	},
		
	rightClick: function(){
		if (this.leftClicks < this.scrollRange){
			var start= this.leftClicks * this.imgWidth;
			var end = (this.leftClicks * this.imgWidth) + this.imgWidth;
			$(this.container).effect('right',{ duration: this.speed, wait:true, transition: Fx.Transitions.Back.easeIn }).start(start,end);
			this.leftClicks++;
		}else{
			/*var start= (this.leftClicks *  this.imgWidth );
			var end = ((this.leftClicks  - this.scrollRange ) * this.imgWidth);
			$(this.container).effect('right',{ duration: this.speed, wait:true, transition: Fx.Transitions.Back.easeIn }).start(start,end);
			this.leftClicks-= this.scrollRange;
			*/
			this.speedReverse(3);
		}
		setSliderNumberActivity();
	},
	
	fastForward: function(inFrontRange){
		var theFrontRange = 4;
		if (inFrontRange > 0) {
			theFrontRange = inFrontRange;
		}
		
		var start= (this.leftClicks) * this.imgWidth;			
		var end = (( this.leftClicks + theFrontRange ) * this.imgWidth);
		$(this.container).effect('right',{ duration: this.speed, wait:true, transition:Fx.Transitions.Back.easeIn }).start(start,end);
		this.leftClicks = this.leftClicks +  theFrontRange;		
	},
	
	speedReverse: function(inBackRange){
		var theBackRange = 4;
		if (inBackRange > 0) {
			theBackRange = inBackRange;
		} 
		var start= (this.leftClicks *  this.imgWidth );
		var end = ((this.leftClicks  - theBackRange ) * this.imgWidth);
		$(this.container).effect('right',{ duration: this.speed, wait:true, transition: Fx.Transitions.Back.easeIn }).start(start,end);
		this.leftClicks-= theBackRange;	
	}
				
});
avScroll.implement(new Options, new Events);