var mfp = {delay_time:3000,imgW:1920, act_time:1800};	
	//按钮切换
	function changeBt(index){
		$(".zhuanti-banner-newsight .bt span").css("background-color","");
		$($(".zhuanti-banner-newsight .bt span").get(index)).css("background-color", "#FFF");	
	}
	function positionInit(){
		var wwd = $(window).width();
		var wd = (mfp.imgW-wwd)/2;
		$(".zhuanti-banner-newsight li").css({"left":-wd+"px"});	
	}

	var banner_start = function(){
		var size = $(".zhuanti-banner-newsight li").size();
		var bt = $(".zhuanti-banner-newsight .bt");
		for(var i=0; i<size; i++){
			if(i==0){
				bt.append("<span style='background-color:#FFF'></span>");
			}else{
				bt.append("<span></span>");	
			}
			
		}	
		
		positionInit();
		
		$(window).resize(function(){
			positionInit();
		});
		
		$(".zhuanti-banner-newsight .bt span").click(function(){
			var brr = $(".zhuanti-banner-newsight li:visible");
			if(!brr.is(":animated")){
				var index = $(".zhuanti-banner-newsight .bt span").index($(this));
				$(".zhuanti-banner-newsight li").fadeOut(mfp.act_time);
				var jdom = $($(".zhuanti-banner-newsight li").get(index));
				jdom.stop().fadeIn(mfp.act_time);
				changeBt(index);	
			}
		});
	
		
		$(".ar").click(function(){
			var brr = $(".zhuanti-banner-newsight li:visible");
			if(!brr.is(":animated")){
				var arr = $(".zhuanti-banner-newsight li:visible").next("li");
				if(arr.size()>0){
					$(".zhuanti-banner-newsight li").fadeOut(mfp.act_time);
					arr.stop().fadeIn(mfp.act_time);
					var index = $(".zhuanti-banner-newsight li").index(arr);
					changeBt(index);
				}else{
					$(".zhuanti-banner-newsight li").fadeOut(mfp.act_time);
					$(".zhuanti-banner-newsight li:first").fadeIn(mfp.act_time);	
					changeBt(0);
				}	
			}
		});	
		$(".al").click(function(){
			var brr = $(".zhuanti-banner-newsight li:visible");
			if(!brr.is(":animated")){
				var arr = $(".zhuanti-banner-newsight li:visible").prev("li");
				if(arr.size()>0){
					$(".zhuanti-banner-newsight li").fadeOut(mfp.act_time);
					arr.stop().fadeIn(mfp.act_time);
						
					var index = $(".zhuanti-banner-newsight li").index(arr);
					changeBt(index);
				}else{
					$(".zhuanti-banner-newsight li").fadeOut(mfp.act_time);
					$(".zhuanti-banner-newsight li:last").fadeIn(mfp.act_time);
					changeBt($(".zhuanti-banner-newsight li").size()-1);	
				}	
			}
		});
		var tm = window.setInterval(function(){$(".zhuanti-banner-newsight .ar").click();},mfp.delay_time);
		$(".zhuanti-banner-newsight").hover(function(){
			
			$(".zhuanti-banner-newsight .ar").css("right","10px").stop().animate({"opacity":"1"});;
			$(".zhuanti-banner-newsight .al").css("left","10px").stop().animate({"opacity":"1"});
			window.clearInterval(tm);	
		},function(){
			$(".zhuanti-banner-newsight .ar").stop().animate({"right":"-50px","opacity":"0"},200);
			$(".zhuanti-banner-newsight .al").stop().animate({"left":"-50px","opacity":"0"},200);
			tm = window.setInterval(function(){$(".zhuanti-banner-newsight .ar").click();},mfp.delay_time);
		});
	}