选择菜单 - 选择属性 - HTML

Question

有没有办法设置selected="selected"为selected="notselected"或类似的东西.我试过selected="false"但它没有做任何事情

谢谢你的所有答案

Answer 1

你可以用一点点jquery轻松完成.请看看演示jsfiddle 演示

标记:

<select multiple="multiple" name="remaintextarea" id="studentremain" size="10">
 <option value="one">One</option>
 <option value="two">Two</option>
 <option value="three">Three</option>
</select>
<button type='button' id='selectall'>Select All</button>
<button type='button' id='deselectall'>De-Select All</button>

JS:

$('#selectall').click(function() {
$('#studentremain > option').attr("selected", "selected");
});   

$('#deselectall').click(function() {
$('#studentremain > option').removeAttr("selected");
 });