this.posterItems.each(function(){ var self = $(this), prev = self.prev().get(0)?self.prev():_this_.posterLastItem, width = prev.width(), height =prev.height(), zIndex = prev.css("zIndex"), opacity = prev.css("opacity"), left ? = prev.css("left"), top = prev.css("top"); self.animate({ width:width, height:height, zIndex:zIndex, opacity:opacity, left:left, top:top }); })按了nextbtn之后其他參數都轉化正常，唯有zIndex一點都沒變。在外部直接設置self.css({zIndex:4})也沒卵用，仿佛不存在似的……