Grid getting expanded in update panel

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C#

<pre lang="xml">asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
    <asp:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="2"
    Height="376px" Width="750px" ScrollBars="Both" >
    <asp:TabPanel ID="TabPanel1" runat="server" HeaderText="Employee Information">

    <ContentTemplate>

<asp:GridView ID="dvRestoreReplicate" runat="server" AllowPaging="True"
         PageSize="10" AutoGenerateColumns="False" EnableTheming="True" Width="883px"
         CellPadding="4" ForeColor="#333333" GridLines="Both"
        DataKeyNames="REPLICATE_ID"
        <RowStyle HorizontalAlign="Center" ForeColor="#333333" BackColor="#F7F6F3" />
        <EmptyDataRowStyle HorizontalAlign="Center" VerticalAlign="Middle" />
        <Columns>
        <asp:TemplateField HeaderText="S.No">
       <ItemTemplate>
       <%# Container.DataItemIndex + 1 %></ItemTemplate>
       </asp:TemplateField>
  <asp:TemplateField HeaderText="Pension Id" Visible="false">
     <ItemTemplate>
     <asp:Label ID="penid" runat="server" Text='<%# bind("PENSIONER_ID") %>'></asp:Label>
     </ItemTemplate>
     </asp:TemplateField>

     <asp:TemplateField HeaderText="PPO No." >
     <ItemTemplate>
     <asp:Label ID="ppo" runat="server" Text='<%# bind("PPO_NO") %>'></asp:Label>
     </ItemTemplate>
     </asp:TemplateField>

   <asp:TemplateField>
     <HeaderTemplate>
     <asp:CheckBox ID="chkHeader" runat="server" AutoPostBack="true" OnCheckedChanged="chkHeader_CheckedChanged" />
     </HeaderTemplate>
     <ItemTemplate>
     <asp:CheckBox ID="chkSelect" runat="server" />
     </ItemTemplate>
     </asp:TemplateField>


      <asp:BoundField DataField="emp_id" HeaderText="EmpId">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                    <asp:BoundField DataField="empName" HeaderText="Emp Name">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>


                    <asp:BoundField DataField="GENDER" HeaderText="Gender">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>


                     <asp:BoundField DataField="father_spouse_name" HeaderText="Father Spouse Name">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>


                    <asp:BoundField DataField="PER_ADD1" HeaderText="Address">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>


                    <asp:BoundField DataField="dept_ID" HeaderText="Dept Id" Visible="false">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>


                    <asp:BoundField DataField="NATURE_OF_Work" HeaderText="Nature of Work">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                    <asp:BoundField DataField="B_PEN" HeaderText="Basic Pension">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>
                    <asp:BoundField DataField="DP" HeaderText="DP">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                     <asp:BoundField DataField="SCALE_NAME" HeaderText="Scale Name">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                    <asp:BoundField DataField="SCHEME_NAME" HeaderText="Scheme Name">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                    <asp:BoundField DataField="DR" HeaderText="DR">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>
                    <asp:BoundField DataField="COM" HeaderText="Commutation">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                   <asp:BoundField DataField="MED" HeaderText="Medical">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>

                 <asp:BoundField DataField="DATEOFBIRTH" HeaderText="Date Of Birth">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>
                <asp:BoundField DataField="DATEOFRETIREMENT" HeaderText="Date of Retirement">
                        <HeaderStyle HorizontalAlign="Center" />
                        <ItemStyle  HorizontalAlign="Center" />
                    </asp:BoundField>


        </Columns>
          <FooterStyle BackColor="#5D7B9D"
            ForeColor="White" Font-Bold="True" />
        <PagerStyle BackColor="#758FAC" ForeColor="White"
            HorizontalAlign="Left" />
        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True"
            ForeColor="#333333" />
        <HeaderStyle HorizontalAlign="Center" ForeColor="White"
            Font-Bold="True" BackColor="#758FAC" />
        <EditRowStyle BackColor="#999999" />
        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
        </asp:GridView>
  </ContentTemplate>
</asp:TabPanel>
<asp:TabPanel ID="TabPanel1" runat="server" HeaderText="Employee Personal Information">
                    <ContentTemplate>
                        <asp:GridView ID="GridView1" runat="server">
                        </asp:GridView>
                        onr
                    </ContentTemplate>
                </asp:TabPanel>
</TabContainer>
</ContentTemplate>
 </asp:UpdatePanel>

When I click on the tab 'Employee Information' my grid goes outside the div.Although I have set scroll bars still the grid is getting expanded and not within the required div.
Any suggetion to contain the grid in required width

Thanks