javascript操作dropDownList问题

Question

javascript有没有提供想C#操作dropdownlist那样insert方法!!我就是想在绑定后用javacript插入一项想进去！????
谢谢！！

Answer 1

<div>
        <asp:DropDownList ID="DropDownList1" runat="server" 
            DataSourceID="SqlDataSource1" DataTextField="CategoryName" 
            DataValueField="CategoryID">
        </asp:DropDownList>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString1 %>" 
            SelectCommand="SELECT [CategoryID], [CategoryName] FROM [Categories]">
        </asp:SqlDataSource>
</div><script type="text/javascript">
         var sel = document.getElementById('<%= DropDownList1.ClientID %>');
         sel.options.add(new Option("增加项", 99));
</script>

Answer 2

妈的我真笨!连个add函数都没仔细看！谢谢大哥！