单击单选按钮时清除下拉选择

Question

我有一组单选按钮.选择主要时,将隐藏"主要公司"字段.我还想在此时清除下拉选择.我怎样才能做到这一点？

<p>
        <label>Company Type:</label>
        <label for="primary"><input onclick="javascript: $('#sec').hide('slow');" type="radio" runat="server" name="companyType" id="primary" checked />Primary</label>
        <label for="secondary"><input onclick="javascript: $('#sec').show('slow');" type="radio" runat="server" name="companyType" id="secondary" />Secondary</label>
        <div id="sec">
        <label for="primary_company">Primary Company:</label>
            <%= Html.DropDownList("primary_company", Model.SelectPrimaryCompanies, "** Select Primary Company **") %>
        </div>

    </p>

Answer 1

您可以清除选择(即,选择第一个选项),如下所示:

$("#primary_company").find('option:first')
                     .attr('selected','selected');