0x800a138f JavaScript Error Unable to get undefined or Null in createRange


My aspx

<%@ Register Assembly="Framework.WebControls" Namespace="Framework.WebControls" TagPrefix="cc1" %>
<cc1:CustTextBox ID="txtUserId" CssClass="showWord7" runat="server"   Width="150px"    MaxLength="15" Text=""></cc1:CustTextBox>

run code input data show error only for IE, chrome is success

enter image description here

Error in the paragraph in the figure

asked on Stack Overflow Nov 14, 2019 by Leslie

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