Similar to a slideshow but scrolls horizontally with left and right navigation

Scroller jQuery Plugin.js

(function($) {
  $.fn.scroller = function(settings) {
    var config = { 'delay' : 4000, 'prev_selector' : '#prev', 'next_selector' : '#next', 'should_loop' : false };

    if (settings) $.extend(config, settings);

    this.each(function() {
      var $this = $(this);

      var current = 0;
      
      var $prev = $(config.prev_selector);
      var $next = $(config.next_selector);
      
      var $children = $this.children();
      var children_count = $children.length;
      var child_width = $children.outerWidth(true);
      
      var progress = function(reverse) {
        current = (reverse ? (--current) : (++current)) % children_count;
        
        if (current < 0) current = children_count - 1;

        $this.animate({ 'left' : -1 * current * child_width });
      };

      if (config.should_loop)
        var interval = setInterval(progress, config.delay);
        
      $next.click(function() {
        progress();
        
        if (config.should_loop) {
          clearInterval(interval);
          
          setTimeout(function() { interval = setInterval(progress, config.delay) }, config.delay * 2);
        }
      });
      
      $prev.click(function() {
        progress(true);
        
        if (config.should_loop) {
          clearInterval(interval);
          
          setTimeout(function() { interval = setInterval(progress, config.delay) }, config.delay * 2);
        }
      });
    });

    return this;
  };
})(jQuery);