asp drodpwndown选择宽度在IE8中不起作用

Question

有没有办法在IE8中扩展asp dopdownlist选择宽度我试过几个css类和一些javascripts它在IE8中没有工作任何帮助？

       <asp:dropdownlist id="ddlCountry" runat="server" AutoPostBack="True" CssClass="ddlcountry-dropdownwidth"  OnSelectedIndexChanged="ddlCountry_SelectedIndexChanged"></asp:dropdownlist>    

和CSS

   .ddlcountry-dropdownwidth {
        width:130px;
       }
   #ddlcountry-dropdownwidth option {
            background: transparent;
            width: 268px;
            padding: 5px;
            font-size: 16px;
            line-height: 1;
            border: 0;
            border-radius: 0;
            height: 34px;
           -webkit-appearance: none;  
           }