js 程式碼

    <script type="text/javascript">
    $(function () {
    
    var Annuals = $("#txtAnnual");
    var today = new Date();
    var year = today.getFullYear();
    Annuals.empty();
    for(var i=year-1;i<=year+1;i++) 
    {
    var option = $("<option>").text(i+'年').val(i)
    Annuals.append(option);
    }
  
})
    </script>
 

 <select id="txtAnnual" name="txtAnnual" runat="server">
                            <option></option>
 </select>

 string year = Request["txtAnnual"];

效果