;(function($){  // $('.banner').banner({});
	
	var banner = function (opt) {
		
		this.defaults = {
			points : false , //有无指针
			speed : 3000,
		}
		
		this.settings = $.extend({},this.defaults,opt); //将一个空对象作为第一个参数
			
	}
	
	banner.prototype = {
		getimglength : function(){ //获取图片数量
			return $(".ui-banner-scroll a").length;	
		},
		getcurrentindex : function(){
				
		},
		getcontainerwidth : function(){ //获取外层容器宽度
			return $('.ui-banner-wrap').innerwidth();
		},
		getimglength : function(){
			return $('.ui-banner-scroll a').length;	
		},
		setpoints : function(){
			
			var pointswrap = '<div class="ui-banner-pointer"></div>';
			var pointsconts = '<a href="javascript:void(0);">&nbsp;</a>';
			$('.ui-banner-scroll').after(pointswrap);
			if($('.ui-banner-pointer').length>0){
				for(i=0;i<this.getimglength();i++){
					$('.ui-banner-pointer').append(pointsconts);	
				}
			}
			
			$('.ui-banner-pointer a').last().css('margin-right','0px');
			var cp = $('.ui-banner-pointer').innerwidth();
			var lp = (this.getcontainerwidth()-cp)/2;
			$('.ui-banner-pointer').animate({left:lp+'px'});
			$('.ui-banner-pointer a').first().addclass('current');
			
		},
		gofade : function(){
			var ab = 0;
			var num = this.getimglength();
			var speed = this.settings.speed;
			$('.ui-banner-scroll a').css('display','none');
			$('.ui-banner-scroll a').eq(0).stop(true,true).fadein().siblings('a').fadeout();
			function fade(){

				ab++;
				$('.ui-banner-scroll a').eq(ab).stop(true,true).fadein(700).siblings('a').fadeout(500);
				$('.ui-banner-pointer a').eq(ab).addclass('current').siblings('a').removeclass('current');	

				if(ab==num+1){
					$('.ui-banner-scroll a').eq(0).stop(true,true).fadein(700).siblings('a').fadeout(500);
					$('.ui-banner-pointer a').eq(0).addclass('current').siblings('a').removeclass('current');
					ab=0;
				}

			};
			
			window.tc = setinterval(fade,speed);
			
			$(document).on('click','.ui-banner-pointer a',function(){
				clearinterval(window.tc);
				var index = $(this).index();
				$('.ui-banner-scroll a').eq(index).stop(true,true).fadein().siblings('a').fadeout();
				$('.ui-banner-pointer a').eq(index).addclass('current').siblings('a').removeclass('current');
				ab=index;
				window.tc = setinterval(fade,speed);
			})
			
			
			
			
		},
		move : function(){
		
			this.gofade();
			switch(this.settings.points){
				case false : return; break;
				case true : this.setpoints();	
			}
			
		},
			
	}
	
	
	$.fn.banner=function(opt){
		return new banner(opt).move();;
	}
	
})(jquery);