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0x800a138f - JavaScript runtime error: Unable to get property 'appendChild' of undefined or null reference
UtilBee.ReadCommonDateTime(txtAsOfDate, CalendarExtenderAsOfDate).Value 'UtilBee' is undefined

last week do not have this error, without shutdown computer and i come back and run, it  got this error.
i rename UtilBee to other name still have UtilBee error , restart IIS still have this error

how to fix ?

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site3.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ReportWebApplication._Default" %> <asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> </asp:Content> <asp:Content ...

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