jQuery -- 操作select

前提

<select id="select_id">
    <option value="0" selected>a</option>
    <option value="1">b</option>
    <option value="2">c</option>
</select>

①禁用

$('#select_id').attr('disabled','disabled');

②取消禁用

$('#select_id').removeAttr('disabled');

③设置value为“1”的项为选中项

$('#select_id').val('1');

④设置text为“c”的项为选中项

$('#select_id').find("option[text='c']").attr("selected",true);

⑤获取当前选中项的value

$('#select_id').val();

⑥获取当前选中项的text

$('#select_id').find("option:selected").text();