$(function(){
	
		//根据窗口大小判断加载不同的尺寸的图片
		function change(){
			var w_width=$(window).width();
				$('img').each(function() {
					if(w_width>999){
						$(this).attr('src',$(this).attr('data-1920'));
					}
					else if(w_width<=999&&w_width>640){
						$(this).attr('src',$(this).attr('data-990'));
					}
					else if(w_width<=640){
						$(this).attr('src',$(this).attr('data-640'));
					}
					
			})
		}change();
	
		
		$(window).load(function() {
			settimeout(hu,500)
			function hu(){
				var b_h=$('.banner li img').height();
					$('.banner li,.banner ul').height(b_h);
			} 	
        });	
		
		$(window).resize(function() {
			change();
			settimeout(hu,500)
			function hu(){
				var b_h=$('.banner li img').height();
					$('.banner li,.banner ul').height(b_h);
			} 	
        });
		
		
		
		var ban_i=0;
		var $n_banner=$('.n_banner');
		var size=$n_banner.find('li').length;
		var banroll=setinterval(moverun,5000);
		
		//banner点击事件
		$('.n_banner .num a').click(function() {
			var index=$(this).index();
				ban_i=index;
				if(!$n_banner.find('li').is(':animated')){
					
					$n_banner.find('li').eq(ban_i)
					.addclass('on')
					.animate({opacity:"1"},800);
					
					$n_banner.find('li').eq(ban_i)
					.siblings()
					.removeclass('on')
					.animate({opacity:"0"},800);
				}
				$(this).addclass('on')
				.siblings().removeclass('on');
   		 });
		 
		 
		 //banner定时器自动滚动
		function moverun(){
			if(!$n_banner.find('li').is(':animated')){
				ban_i<size-1?ban_i++:ban_i=0;
				$n_banner.find('li').eq(ban_i)
				.addclass('on')
				.animate({opacity:"1"},800);
				
				$n_banner.find('li').eq(ban_i)
				.siblings()
				.removeclass('on')
				.animate({opacity:"0"},800);
				
				$('.n_banner .num a').eq(ban_i)
				.addclass('on').siblings()
				.removeclass('on');
			}
		 };
			  
		 //hover移除
		 $('.n_banner').hover(function() {
			clearinterval(banroll);
		 },function(){
			banroll=setinterval(moverun,5000);	
		 });
			
			
		//banner移动端
		var startx, starty, moveendx, moveendy, x, y;
			$n_banner.find('li').on('touchstart',function(e){
				e.preventdefault();
				startx = e.originalevent.changedtouches[0].pagex,
				starty = e.originalevent.changedtouches[0].pagey;
				clearinterval(banroll);
			});
			
			
			$n_banner.find('li').on('touchmove',function(e){
				e.preventdefault();
				moveendx = e.originalevent.changedtouches[0].pagex,
				moveendy = e.originalevent.changedtouches[0].pagey;
				x = moveendx - startx,
				y = moveendy - starty;
				if(math.abs(x) > math.abs(y)) {
					if(x>30){
						moverun()
					}else if(x<0){
						if(!$n_banner.find('li').is(':animated')){
							ban_i>0?ban_i--:ban_i=size-1;
							
							$n_banner.find('li').eq(ban_i)
							.addclass('on')
							.animate({opacity:"1"},800);
							
							$n_banner.find('li').eq(ban_i)
							.siblings()
							.removeclass('on')
							.animate({opacity:"0"},800);
							
							$('.n_banner .num a').eq(ban_i)
							.addclass('on').siblings()
							.removeclass('on');
						}
					}
				}
			});
				
			$n_banner.find('li').on('touchend',function(e){
				e.preventdefault();
				moveendx = e.originalevent.changedtouches[0].pagex,
				moveendy = e.originalevent.changedtouches[0].pagey;
				x = moveendx - startx,
				y = moveendy - starty;
				if(x==0&&y==0){
					var _link=$(this).children('a').attr('href');
					window.open(_link)
				};
				banroll=setinterval(moverun,5000);	
			});
			
			
		
		
	})