(function($){
	$.fn.nav=function(option){
		var _this=$(this),
		cont=_this.next(),
		img=cont.find("img"),
		timer,
		n,
		timer_h,
		index,
		defaults={scale:1.2},
		opts=$.extend({},defaults,option);
		//	初始化二级导航位置
		cont.css("top",_this.offset().top+_this.outerheight()+"px");
		//初始化二级导航栏目大小
		cont.find("a").width(opts.width).height(opts.height);
		
		_this.on("mouseenter","a",function(){
			var that=$(this);
			//导航栏目下小背景条动画
			console.log("//导航栏目下小背景条动画")
			var wd=document.documentelement.clientwidth;
			that.find("."+opts.line).stop().animate({width:"100%",left:0,opacity:1},200)
			that.siblings().removeclass("c").find("."+opts.line+":not(."+opts.linesel+")").stop().animate({width:0,left:"50%",opacity:0},200)
			n=0;
			
			if(that.attr(opts.expattr)){//判断是否有二级菜单
				cleartimeout(timer);
				console.log("判断是否有二级菜单")
				var wd=document.documentelement.clientwidth;
				cont.stop().animate({height:opts.height+100+"px",width:wd,marginleft:-_this.offset().left},200);
				if(!that.hasclass("c")){
					index=_this.find("a["+opts.expattr+"]").index(this);
					cont.children().eq(index).show().siblings().hide()
					menuinit()//二级菜单初始化
					sn(cont.children().eq(index))
					that.addclass("c")
				}
			}else{
				timer=settimeout(function(){
					cont.stop().animate({height:0},200)
					menuinit()
				},200)
			}
				
		})
		_this.parent().on("mouseleave",function(){//鼠标离开整个导航区
			console.log("鼠标离开整个导航区")
			_this.find("."+opts.line+":not(."+opts.linesel+")").stop().animate({width:0,left:"50%"},200)
			cont.stop().animate({height:0},200)
			menuinit()
			_this.find("a").removeclass("c")
		})
 		img.each(function(){//二级菜单图片鼠标滑过效果
 			console.log("二级菜单图片鼠标滑过效果")
			$(this).parent().hover(function(){
				$(this).stop().animate({width:opts.width*1.2+"px",height:opts.height*1.2+"px",left:-0.1*opts.width+"px",top:-0.1*opts.height,opacity:0.3},400)
			},function(){
				$(this).stop().animate({width:opts.width+"px",height:opts.height+"px",left:0,top:0,opacity:1},400)		
			})	
		})
		function menuinit(){//初始化二级菜单
            console.log("初始化二级菜单")
			img.each(function(){
				$(this).parent().css({width:0,height:0,left:"50%",top:"50%"})	
				$(this).parent().siblings().hide()
			})
		}
		function sn(obj){//二级菜单逐个显示
			console.log("二级菜单逐个显示")
                obj.find("img").eq(n).parent().animate({width:opts.width+"px",height:opts.height+"px",left:0,top:0},40,function(){
                    obj.find("img").eq(n).parent().next().show()
                    n+=1
                    if(n<obj.find("img").length)
                        sn(obj)
                })
		}
	}
})(jquery)