/*
滚动插件
#index_events{height:150px; overflow:hidden; padding:1px;}
#index_events li{margin-bottom:3px;}
#events_up{background:url(../images/line.gif) no-repeat center bottom; padding-bottom:1px; text-align:center; margin-bottom:5px;}
#events_down{background:url(../images/line.gif) no-repeat center top;text-align:center; padding-bottom:5px; margin-bottom:5px; padding-top:1px; margin-top:5px;}

#scroll_left_news,#scroll_left_pro{width:150px; height:120px; overflow:hidden; position:relative; margin:0 auto; border-bottom:1px solid #5C5B5B; padding:5px 0;}
#scroll_left_filter{width:150px; overflow:hidden; position:relative; margin:0 auto; border-bottom:1px solid #5C5B5B; padding:5px 0;}
#scroll_left_news ul,#scroll_left_pro ul{position:absolute; width:20000px;}
#scroll_left_news li,#scroll_left_pro li{width:52px; height:120px; margin-right:5px; margin-left:13px; display:inline; float:left; border-bottom:1px solid #666;}

$("#index_events").Scroll({line:1,speed:500,timer:2000,up:"events_up",down:"events_down"});  //垂直滚动
$("#scroll_left_news").Scroll({line:1,speed:500,timer:5000,vertical:false}); //水平滚动
*/
(function($){
$.fn.extend({
	Scroll:function(opt,callback){
		if(!opt){var opt={};}
		var _btnUp = $("#"+opt.up);
		var _btnDown = $("#"+opt.down);
		var timerID;
		var _this=$(this).find("ul:first");
		var lineH=_this.find("li:first").outerHeight(true);
		var lineW=_this.find("li:first").outerWidth(true);
		//参数
		var line=opt.line?parseInt(opt.line,10):1;
		var speed=opt.speed?parseInt(opt.speed,10):500;
		var timer=opt.timer?parseInt(opt.timer,10):3000;
		var vertical=opt.vertical==undefined?true:false;//是否垂直 默认true
		var auto=opt.auto==undefined?true:false;//是否自动播放 默认true
		//
		if(line==0) line=1; 
		if(vertical==undefined){vertical=true;}
		var upHeight=0-line*lineH;
		//滚动函数
		var scrollUp=function(){
			_btnDown.unbind("click",scrollUp);
			for(i=0;i<line;i++){
				_this.find("li:first").show().appendTo(_this);
			}
			_this.css({marginTop:0});
			_this.animate({marginTop:upHeight},speed,function(){
				_btnDown.bind("click",scrollUp);
			});
		}
		var scrollDown=function(){
			_btnUp.unbind("click",scrollDown);
			for(i=0;i<line;i++){
				_this.find("li:last").show().prependTo(_this);
			}
			_this.css({marginTop:upHeight});
			_this.animate({marginTop:0},speed,function(){
				_btnUp.bind("click",scrollDown);
			});
		}
		var scrollLeft=function(){
			_btnDown.unbind("click",scrollLeft);
			_this.animate({left:"-"+line*lineW},speed,function(){
				for(i=0;i<line;i++){
					var _li=_this.find("li:eq(0)");
					var _lic=_li.clone(true);
					_li.remove();
					_lic.appendTo(_this).fadeTo(0,0).fadeTo("fast",1);
				}
				_this.css({left:0});
				_btnDown.bind("click",scrollLeft);
			});
		}
		var scrollRight=function(){
			_btnUp.unbind("click",scrollRight);
			var len=_this.find("li").size();
			_this.animate({left:line*lineW},speed,function(){
				for(i=len;i>len-line;i--){
					var _li=_this.find("li:last");
					var _lic=_li.clone(true);
					_li.remove();
					_lic.prependTo(_this).fadeTo(0,0).fadeTo("fast",1);
				}
				_this.css({left:0});
				_btnUp.bind("click",scrollRight);
			});
		}
		var autoPlay =function(){if(timer){timerID = window.setInterval(scrollUp,timer);};};
		var autoPlay_1=function(){if(timer){timerID = window.setInterval(scrollLeft,timer);};};
		var autoStop=function(){if(timer){window.clearInterval(timerID);};};
		if(vertical){
			//垂直滚动
			if(auto){
				//自动滚动	
				_this.hover(autoStop,autoPlay).mouseout();
				_btnUp.css("cursor","pointer").click(scrollDown).hover(autoStop,autoPlay);
				_btnDown.css("cursor","pointer").click(scrollUp).hover(autoStop,autoPlay);
			}else{
				//非自动滚动
				_btnUp.css("cursor","pointer").click(scrollDown);
				_btnDown.css("cursor","pointer").click(scrollUp);
			}
		}else{
			//水平滚动
			if(auto){
				//自动滚动	
				_this.hover(autoStop,autoPlay_1).mouseout();
				_btnUp.css("cursor","pointer").click(scrollRight).hover(autoStop,autoPlay_1);
				_btnDown.css("cursor","pointer").click(scrollLeft).hover(autoStop,autoPlay_1);
			}else{
				//非自动滚动
				_btnUp.css("cursor","pointer").click(scrollRight);
				_btnDown.css("cursor","pointer").click(scrollLeft);
			}
		}
	}
})
})(jQuery);