$(
    function()
    {
        var Category = function ShowCategory()
        {
            if (this.CategoryConten == null)
            {
                var left = $($($("#search_product").parent()[0]).parent()[0]).css("left");
                this.CategoryConten = document.createElement("div");
                $(this.CategoryConten).attr("class", "categoryContent")
                $(this.CategoryConten).css("left", (screen.width - 960) / 2 - 10);
                $(this.CategoryConten).html(new Date().getMilliseconds());
                document.documentElement.appendChild(this.CategoryConten);
                return this.CategoryConten;
            }
            else
            {                
                return this.CategoryConten;
            }
        };        $("#search_product").mouseover(function() { $(Category).css("display", "block"); });
        $("#search_product").mouseout(function() { $(Category).css("display", "none"); });
    }
    );
鼠标移到search_product时可以显示Category
为什么鼠标移开search_product时不可以隐藏Category呢?