jQuery.fn.extend({
	dongRollDoor : function(){
		var bars = this.find("ul:first-child > li");
		var boxs = this.find("ul:nth-child(2) > li");
		
		bars.eq(0).attr("class","barIn");
		boxs.eq(0).css("display","block");
		
		
		for (var i=0; i<bars.length; i++){
			bars.eq(i).attr("dong_rollDoor_barId",i);
			boxs.eq(i).attr("dong_rollDoor_boxId",i);
		}
		bars.mouseover(function (){
				hideAllBox();
				//
				$(this).removeClass("barIn");
				$(this).addClass("barIn");
				
				var n = $(this).attr("dong_rollDoor_barId");
				var thisBox = boxs.filter("[dong_rollDoor_boxId='"+ n +"']");
				thisBox.css("display","block");
		});
		function hideAllBox(){
			boxs.css("display","none");
			bars.removeClass("barIn");
		}
	}
});