(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'){
                    _scrollObj[_dir] +=opts.scrollAmount;
                    if(_scrollObj[_dir]>=scrollSize){
                        _scrollObj[_dir] = 0;
                    }
                }else{
                    _scrollObj[_dir] -=opts.scrollAmount;
                    if(_scrollObj[_dir]<=0){
                        _scrollObj[_dir] = scrollSize;
                    }
                }
            }

            var moveId = setInterval(scrollFunc, opts.scrollDelay);

            $marquee.hover(
                function(){
                    clearInterval(moveId);
                },
                function(){
                    clearInterval(moveId);
                    moveId = setInterval(scrollFunc, opts.scrollDelay);
                }
            );
            
        });
    };
    $.fn.kxbdMarquee.defaults = {
        isEqual:true,
        loop: 0,
        direction: 'left',
        scrollAmount:1,
        scrollDelay:20

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