可以'；t在php中获取下拉列表的选定值

有问题的下拉列表称为subCategory，它的内容是通过选择另一个下拉类别来填充的，即它的onchange事件正在触发ajax请求。

问题是，即使子类别的内容按预期填充(可见(，并且我可以看到它们并在子类别下拉列表中选择它们，但当我执行php post时，无论我是否选择任何其他元素，我都只能获得初始选项<option value="subCategory1">Select a subcategory</option>的值。

也许dom没有刷新，但我不确定。。

提交后直接打印$_REQUEST的PHP

Array ( [act] => additem  [category] => 200381 [subCategory] => subCategory )

HTML(已编辑(

<form id="additemform" action="add-item.php?act=additem" method="post" enctype='multipart/form-data'>
    <div id="section-category">
        <select id="category" class="category"  name="category">
            <option value="category1">Select a category</option>
            {html_options values=$cat_id_array  options=$cat_names_array selected=$smarty.session.additem_category} 
        </select>
        <p class="test" id="boxCity">
        <select id="subCategory"  class="subCategory" name="subCategory">
            <option value="subCategory1">Select a subcategory</option>
                {html_options  options=$smarty.session.subcategories selected=$smarty.session.additem_subcategory}
        </select>
        </p>
    </div>
    <!--/#section-category-->
    <div class="bottom-area">
        <input id="submit-addItem" type="button" value="Add my item" />
    </div>                    
</form>

页面来源：

<div id="section-category">
 <select id="category" class="category"  name="category">
    <option value="category1">Select a category</option>
    <option value="200381" selected="selected">Antiques</option>
    <option value="200841" >Other cat</option>
</select>
<p class="test" id="boxCity">
<select id="subCategory"  class="subCategory" name="subCategory">
    <option value="subCategory1">Select a subcategory</option>
    <option value="23430118">Digital Art</option>
    <option value="6643435">Photographic Images</option>
</select>
</p>
</div><!--/#section-category-->

JQUERY

$(function () {
    //$("#subCategory").selectbox();
    $("#section-category #category").selectbox({
    onChange: function () {
        var id=$(this).val(); 
        var dataString = 'id='+ id;  
        $.ajax  
        ({  
        type: "POST",  
        url: "findsub.php",  
        data: dataString,  
        cache: false,  
        success: function(html)  
        {  
            //$("#subCategory").selectbox("detach")
            $("#subCategory").html(html);
        // $("#section-category #subCategory").selectbox();
        }  
    }); 

},
effect: "slide"
}); 
$('.subCategory').change(function() {
//NOTE I CAN SEE THE SELECTED VALUE OF THE SUBCATEGORY NORMALLY IN THIS ALERT   
    alert($(this).serialize());
return false;
});