$(document).ready(function() {
	//move he last list item before the first item. The purpose of this is if the user clicks to slide left he will be able to see the last item.
	$('#timeline-ul-home li:first').before($('#timeline-ul-home li:last')); 
	
	
	//when user clicks the image for sliding right        
	$('#right-scroll-home').click(function(){
	
		//get the width of the items ( i like making the jquery part dynamic, so if you change the width in the css you won't have o change it here too ) '
		var item_width = $('#timeline-ul-home li').outerWidth() + 20;
		
		//calculae the new left indent of the unordered list
		var left_indent = parseInt($('#timeline-ul-home').css('left')) - item_width;
		
		//make the sliding effect using jquery's anumate function '
		$('#timeline-ul-home:not(:animated)').animate({'left' : left_indent},400,'easeOutCubic',function(){    
			
			//get the first list item and put it after the last list item (that's how the infinite effects is made) '
			$('#timeline-ul-home li:last').after($('#timeline-ul-home li:first')); 
			
			//and get the left indent to the default -210px
			$('#timeline-ul-home').css({'left' : '-300px'});
		}); 
	});
	
	//when user clicks the image for sliding left
	$('#left-scroll-home').click(function(){
		
		var item_width = $('#timeline-ul-home li').outerWidth() + 20;
		
		/* same as for sliding right except that it's current left indent + the item width (for the sliding right it's - item_width) */
		var left_indent = parseInt($('#timeline-ul-home').css('left')) + item_width;
		
		$('#timeline-ul-home:not(:animated)').animate({'left' : left_indent},400,'easeOutCubic',function(){    
		
		/* when sliding to left we are moving the last item before the first list item */            
		$('#timeline-ul-home li:first').before($('#timeline-ul-home li:last')); 
		
		/* and again, when we make that change we are setting the left indent of our unordered list to the default -210px */
		$('#timeline-ul-home').css({'left' : '-300px'});
		});
		
		
	});
});