(function($){

	$.fn.ScrollMarquee = function(options){
		var opts = $.extend({},$.fn.ScrollMarquee.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.ScrollMarquee.defaults = {
		delay:0,
		isEqual:true,
		loop: 0,
		direction: 'left',
		scrollAmount:1,
		scrollDelay:30,
		newAmount:3,
		eventA:'mousedown',
		eventB:'mouseup'
	};
	
	$.fn.ScrollMarquee.setDefaults = function(settings) {
		$.extend( $.fn.ScrollMarquee.defaults, settings );
	};
	
})(jQuery);