datagrid/GridView 控件的多浏览器的支持

Question

我们一个页面上用到datagrid/GridView 控件,在IE显示是正常的,在firefox中,datagrid现在出来table的宽度变窄了,而且,表格线的颜色变成了红色,请教大家该如何去改?
<asp:GridView ID="gviewUser"  runat="server" Width="99%" PageSize="13" AllowPaging="True" DataKeyNames ="userid,username,showflag"
 AllowSorting="True" AutoGenerateColumns="False" OnRowDataBound="gviewUser_RowDataBound" OnPageIndexChanging="gviewUser_PageIndexChanging" OnSorting="gviewUser_Sorting" EnableViewState="true" OnRowDeleting="gviewUser_RowDeleting" BorderColor="#999999" cellpadding="3" cellspacing="0" BorderWidth="1" >

<HeaderStyle HorizontalAlign="Center" Height="18px" BackColor="#CCCCCC"></HeaderStyle>
<Columns>
<asp:BoundField DataField="username" SortExpression="username" HeaderText="用户名" >
<HeaderStyle Width="10%"></HeaderStyle><ItemStyle Height="18px"></ItemStyle>
</asp:BoundField>
<asp:BoundField DataField="city" SortExpression="city" HeaderText="所在地">
<HeaderStyle Width="10%"></HeaderStyle>
</asp:BoundField>
<asp:BoundField DataField="zxdept" SortExpression="zxdept" HeaderText="部门">
<HeaderStyle Width="14%"></HeaderStyle>
</asp:BoundField>
<asp:BoundField DataField="business" SortExpression="business" HeaderText="职务">
<HeaderStyle Width="17%"></HeaderStyle>
</asp:BoundField>
<asp:BoundField DataField="showflag" SortExpression="showflag" HeaderText="类别">
<HeaderStyle Width="9%"></HeaderStyle>
</asp:BoundField>
<asp:TemplateField HeaderText="维护操作">
<HeaderStyle Width="40%"></HeaderStyle>
<ItemStyle HorizontalAlign="Center"></ItemStyle>
<ItemTemplate>


                                <asp:Literal ID="LitMenu" runat="server" EnableViewState=false ></asp:Literal>
                                <asp:Literal ID="LitReportMenu" runat="server" EnableViewState=false ></asp:Literal>
                                <asp:Literal ID="LitShare" runat="server" EnableViewState=false></asp:Literal>
                                <asp:Literal ID="LitEdit" runat="server" EnableViewState=false></asp:Literal>
                                <asp:LinkButton id="lbtnDelete"  CommandName="Delete" runat="server" >删除用户</asp:LinkButton>
                                <asp:Literal ID="LitRange" runat="server" EnableViewState=false></asp:Literal>
</ItemTemplate>
</asp:TemplateField>
</Columns>
                    <PagerSettings Position="TopAndBottom" />
                    <RowStyle BorderColor="Red"/>                    </asp:GridView>