$(function(){

/* GET NUMBER OF LIST ITEMS AND SET CURRENT POSITION TO 1 */

	var numberOfLis = $('#scroller ul li').length;
	var currentPosition = '1';


/* ADD MOVEMENT ON LOAD */
	
	$('#scroller ul').css('left', '-899px');
	$('#scroller ul').animate({'left' : '+=899px'},1000, 'easeOutBack');


/* SCROLL WHEN ARROW IMAGES ARE CLICKED */

	$('#scroll-right').click(function(){
		if (currentPosition !=(numberOfLis - '3')){
			$('#scroller ul').animate({'left' : '-=228px'},1000, 'easeOutBack');
			
			currentPosition ++;
			
			imageChange(currentPosition);
			
		};		
	});
	
	$('#scroll-left').click(function(){
		if (currentPosition !=1){
			$('#scroller ul').animate({'left' : '+=228px'},1000, 'easeOutBack');
					
			currentPosition --;
			
			imageChange(currentPosition);
	
		};
	});


/* ADD OR REMOVE IMAGES DEPENDING ON POSITION */

	function imageChange(currentPosition){
		if(currentPosition == 1){
			$('#scroll-left').attr('src', 'nav/blank.gif');
		}else{
			$('#scroll-left').attr('src', 'nav/left.gif');
		};
		
		if(currentPosition ==(numberOfLis - '3')){
			$('#scroll-right').attr('src', 'nav/blank.gif');
		}else{
			$('#scroll-right').attr('src', 'nav/right.gif');
		};
	}
	


});