$(document).ready(function(){
      $('#carousel_ul').each(function(){
            // get current ul
            var $ul = $(this);
            // get array of list items in current ul
            var $liArr = $ul.children('li');
            // sort array of list items in current ul randomly
            $liArr.sort(function(a,b){
                  // Get a random number between 0 and 10
                  var temp = parseInt( Math.random()*10 );
                  // Get 1 or 0, whether temp is odd or even
                  var isOddOrEven = temp%2;
                  // Get +1 or -1, whether temp greater or smaller than 5
                  var isPosOrNeg = temp>5 ? 1 : -1;
                  // Return -1, 0, or +1
                  return( isOddOrEven*isPosOrNeg );
            })
            // append list items to ul
            .appendTo($ul);            
      });
});

 
 $(document).ready(function() {
        //move the 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.
        $('#carousel_ul li:first').before($('#carousel_ul li:last')); 
        
        
        //when user clicks the image for sliding right        
        $('#right_scroll img').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 = $('#carousel_ul li').outerWidth() + 10;
            
            //calculae the new left indent of the unordered list
            var left_indent = parseInt($('#carousel_ul').css('left')) - item_width;
            
            //make the sliding effect using jquery's animate function '
            $('#carousel_ul:not(:animated)').animate({'left' : left_indent},500,function(){    
                
                //get the first list item and put it after the last list item (that's how the infinite effects is made) '
                $('#carousel_ul li:last').after($('#carousel_ul li:first')); 
                
                //and get the left indent to the default -210px
                $('#carousel_ul').css({'left' : '-302px'});
            }); 
        });
        
        //when user clicks the image for sliding left
        $('#left_scroll img').click(function(){
            
            var item_width = $('#carousel_ul li').outerWidth() + 10;
            
            /* 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($('#carousel_ul').css('left')) + item_width;
            
            $('#carousel_ul:not(:animated)').animate({'left' : left_indent},500,function(){    
            
            /* when sliding to left we are moving the last item before the first list item */            
            $('#carousel_ul li:first').before($('#carousel_ul li:last')); 
            
            /* and again, when we make that change we are setting the left indent of our unordered list to the default -210px */
            $('#carousel_ul').css({'left' : '-302px'});
            });
            
            
        });
  });