<ul id="navigation">
              <asp:Repeater ID="repeater_producttype" runat="server" OnItemDataBound="Repeater_producttype_ItemDataBound"> 
          <ItemTemplate>
                                   
                                   <span style ="font-weight :bold ">
                                   <li><img  width="17px" height="15px" src="images/tag.jpg"/></li>
                                              <a href="productlist.aspx?id=<%#Eval("producttype_id").ToString().Trim()%>" style=" color:#ffffff;background-color:#033373;font-size:14px;"><%#Eval("producttype_name").ToString().Trim()%></a></span>
<ul>
                                                <asp:Repeater ID="repeater_smallproducttype" runat="server">
                                            <ItemTemplate>
                                            <li>
                                                <a href="productlist.aspx?id=<%#Eval("smallproducttype_id").ToString().Trim()%>" style=" color:#ffffff;"><%#Eval("smallproducttype_name").ToString().Trim()%></a>
                                                        </li>  
                                                         </ItemTemplate>
                                        </asp:Repeater>
                                       </ul> 
                                   </ItemTemplate>
                       </asp:Repeater>
                      </ul>  哪位大虾有点击大类下拉小类的JS啊,简单的,小弟谢过各位了