// javascript document
$(function() {

 
    //新闻滚动
    function news_scroll(){
	var nb = $("#rollnews"),
					ul = nb.find('.newslist'),
					up = $(".news_btn .up"),
					down = $(".news_btn .down"),
					idx = 1,
					delay = 3000,
					speed = 1000,
					len = nb.find(".content").length,
					maxtop = - (len-1)*44;
					
					
					
				nb.hover(function(){				
					clearinterval(autoplay);
				},function(){
					autoplay = setinterval(ap,delay);																				
				}).trigger('mouseleave');
				
				up.on('click',function(){
					clearinterval(autoplay);
					if(idx == 1){
						idx = len;				
						ul.animate({margintop:'+=44px'},speed,function(){
						ul.css({margintop:maxtop});
						
					});		
						
					}else{
						idx --;
						ul.stop(false,true).animate({margintop:'+=44px'},speed);
					}
					autoplay = setinterval(ap,delay);
					return false;
				});
				
					down.on('click',function(){
						clearinterval(autoplay);
						if(idx == len){
							idx = 1;
							ul.animate({margintop:'-=44px'},speed,function(){
							ul.css({margintop:'0'});				
					});
							
						}else{
							idx++;
							ul.stop(false,true).animate({margintop:'-=44px'},speed);
						}
						autoplay = setinterval(ap,delay);
						return false;
					});	
									
				function ap(){					
					idx++;
					if(idx<=len){					
						ul.stop().animate({margintop:'-=44px'},speed);
					}else{
						idx = 1;
						ul.animate({margintop:'-=44px'},speed,function(){
						ul.css({margintop:'0'});
						});					
					}											
				};	
	
};
	news_scroll();//新闻滚动
    
});