ComboTree添加onchange事件监听后无法响应选中问题

 <div class="topjui-row">
        <div class="topjui-col-sm12">
            <label class="topjui-form-label">责任部门</label>
            <div class="topjui-input-block">
                <input type="text" name="OrganizeId" id="OrganizeId"
                       data-toggle="topjui-combotree"
                       data-options="
                       prompt:'必填',
                       textField:'text',
                        multiple:false,
                           required:true,
                       url:usercenterHost+'/api/usercenter/treeorganizesbycode',
                       expandUrl:usercenterHost+'/api/usercenter/treechildrenorganizesbycode?pid={id}',
                       getFatherIdsUrl:usercenterHost+'/api/usercenter/getfatheridsbycode?uuid={id}'">
            </div>
        </div>
    </div>
    <div class="topjui-row">
        <div class="topjui-col-sm12">
            <label class="topjui-form-label">责任岗位</label>
            <div class="topjui-input-block">
                <input type="text" name="PostId" id="PostId" data-toggle="topjui-combobox"
                       data-options="valueField:'id'">
            </div>
        </div>
    </div>

<script>
    $(function () {
        $("#OrganizeId").iCombotree({
            onChange: function (newValue, oldValue) {
                $('#PostId').iCombobox('reload', usercenterHost + 'api/usercenter/postsbyorganizecode?orcode=' + newValue);
            }
        })
    });
</script>