(function($) {

    $.fn.kxbdMarquee = function(options) {
        var opts = $.extend({}, $.fn.kxbdMarquee.defaults, options);

        return this.each(function() {
            var $marquee = $(this);
            var _scrollObj = $marquee.get(0); 
            var scrollW = $marquee.width(); 
            var scrollH = $marquee.height();
            var $element = $marquee.children();
            var $kids = $element.children(); 
            var scrollSize = 0;
            var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1 : 0;

            $element.css(_type ? 'width' : 'height', 10000);
            if (opts.isEqual) {
                scrollSize = $kids[_type ? 'outerWidth' : 'outerHeight']() * $kids.length;
            } else {
                $kids.each(function() {
                    scrollSize += $(this)[_type ? 'outerWidth' : 'outerHeight']();
                });
            }
            if (scrollSize < (_type ? scrollW : scrollH)) return;
            $element.append($kids.clone()).css(_type ? 'width' : 'height', scrollSize * 2);

            var numMoved = 0;
            function scrollFunc() {
                var _dir = (opts.direction == 'left' || opts.direction == 'right') ? 'scrollLeft' : 'scrollTop';
                if (opts.loop > 0) {
                    numMoved += opts.scrollAmount;
                    if (numMoved > scrollSize * opts.loop) {
                        _scrollObj[_dir] = 0;
                        return clearInterval(moveId);
                    }
                }
                if (opts.direction == 'left' || opts.direction == 'up') {
                    var newPos = _scrollObj[_dir] + opts.scrollAmount;
                    if (newPos >= scrollSize) {
                        newPos -= scrollSize;
                    }
                    _scrollObj[_dir] = newPos;
                } else {
                    var newPos = _scrollObj[_dir] - opts.scrollAmount;
                    if (newPos <= 0) {
                        newPos += scrollSize;
                    }
                    _scrollObj[_dir] = newPos;
                }
            };
            var moveId;
            if (opts.delay > 0) {
                setTimeout(function() {
                    moveId = setInterval(scrollFunc, opts.scrollDelay);
                }, opts.delay * 1000);
            } else {
                moveId = setInterval(scrollFunc, opts.scrollDelay);
            }

            $marquee.hover(
				function() {
				    clearInterval(moveId);
				},
				function() {
				    clearInterval(moveId);
				    moveId = setInterval(scrollFunc, opts.scrollDelay);
				}
			);

            if (opts.controlBtn) {
                $.each(opts.controlBtn, function(i, val) {
                    $(val).bind(opts.eventA, function() {
                        opts.direction = i;
                        opts.oldAmount = opts.scrollAmount;
                        opts.scrollAmount = opts.newAmount;
                    }).bind(opts.eventB, function() {
                        opts.scrollAmount = opts.oldAmount;
                    });
                });
            }
        });
    };
    $.fn.kxbdMarquee.defaults = {
        delay: 0,
        isEqual: true, 
        loop: 0,
        direction: 'left', 
        scrollAmount: 1,
        scrollDelay: 40, 
        newAmount: 3, 
        eventA: 'mousedown', 
        eventB: 'mouseup'
    };

    $.fn.kxbdMarquee.setDefaults = function(settings) {
        $.extend($.fn.kxbdMarquee.defaults, settings);
    };

})(jQuery);