Asp：dropdownlist和ClientSideValidation

Question

我有许多dropDownLists和customvalidators，用于检查用户在点击保存按钮时是否从下拉列表中选择了一个选项

   <asp:DropDownList runat="server" ID="ddpCountries" ClientIDMode="Static">
                </asp:DropDownList>
                  <asp:CustomValidator ID="CustomValidator2"
                    ControlToValidate="ddpCountries"
                    ClientValidationFunction="ValidateDropDownListCountry"
                    ValidateEmptyText="true"
                    runat="server"
                    Text="*"
                    ForeColor="Red"
                    ValidationGroup="CheckControls" />
 <asp:Button runat="server" ID="bnSavePopup" Text="Save" OnClick="BnSaveDetailsClick"  
 ValidationGroup="CheckControls"  />

我想在javascript中创建一个客户端验证方法，它将识别从传递给javascript函数的争论中调用它的控件的名称。目前我已硬编码名称（$（“＃ddpCountries”）。val（）;）例如：

 function ValidateDropDownListCountry(source, arguments) {
     var SelectedValue = $("#ddpCountries").val();
     if (SelectedValue != "-1") { 
         arguments.IsValid = true;
     } else {
          arguments.IsValid = false;
     }
}

是否有动态方法从arguements参数推断附加到自定义验证器的输入名称？