使用Jquery更改我的下拉列表的选定索引

Question

大家好我试图改变一个下拉列表选择索引一旦另一个更改,我想使用jquery选择下拉列表.这是我的一些代码:

<div id = "monthlist">
<select name = "months">
   <option value = 1 > January </option>
   <option value = 2 > Febuary </option>
   <option value = 3 > March </option>
   <option value = 4 > April </option>
   <option value = 5 > May </option>
   <option value = 6 > June </option>
   <option value = 7 > July </option>
   <option value = 8 > August </option>
   <option value = 9 > September </option>
   <option value = 10 > October</option>
   <option value = 11 > November </option>
   <option value = 12 > December </option>
   </select>
   </div>

   <div id = "yearlist">
   <select name = "years">
   <option value = 1993 > 1993 </option>
   <option value = 1994 > 1994 </option>
   <option value = 1995 > 1995 </option>
   <option value = 1996 > 1996 </option>
   <option value = 1997 > 1997 </option>
   <option value = 1998 > 1998 </option>
   <option value = 1999 > 1999 </option>
   <option value = 2000 > 2000 </option>
   <option value = 2001 > 2001 </option>
   </select>
   </div>

JQuery代码在这里:

$("#monthlist").change(function(){

        $("select#yearlist").prop('selectedIndex', 2);
    });

我想在月份表下拉列表更改后将选定的"年份列表"索引设置为特定索引.但我的选择器或我的代码不正确,任何建议或提示将不胜感激.

Answer 1

您正尝试按名称选择月份和年份列表.使用外部div的ID代替......

$("div#monthlist select").change(function(){
    $("div#yearlist select")[0].selectedIndex = 2;
});