关于文件上传的问题

悬赏园豆：10 [已解决问题] 解决于 2013-01-17 16:44

求助：下面是添加上传文件的代码，没看懂。在运行到if(uploadobj.getqueuecount()>0)时，报错，说拒绝访问。请大家帮忙

 function submitbutton_click() {
            var submitbutton = document.getElementById('<%=SubmitButton.ClientID %>');
            var uploadobj = document.getElementById('<%=Uploader1.ClientID %>');
            if (!window.filesuploaded) {
                if (uploadobj.getqueuecount() > 0) {
                    uploadobj.startupload();
                }
                else {
                    var uploadedcount = parseInt(submitbutton.getAttribute("itemcount")) || 0;
                    if (uploadedcount > 0) {
                        return true;
                    }
                    alert("请添加要上传的文件");
                }
                return false;
            }
            window.filesuploaded = false;
            return true;
        }

上传附件的代码如下：

<div>
                        <CuteWebUI:UploadAttachments runat="server" ManualStartUpload="true" ID="Uploader1" 
                            InsertText="浏览添加上传的附件" OnFileUploaded="Uploader_FileUploaded" 
                            CancelAllMsg="取消所有的上传" CancelText="取消"  CancelUploadMsg="取消上传" 
                            FileTooLargeMsg="{0} 不能上传!&#10;&#10;文件 ({1}) 太大. 允许上传的最大上线是: {2}." 
                            RemoveButtonText="删除" ShowRemoveButtons="false" ShowProgressInfo="False" UploadingMsg="附件上传中，请耐心等待..."  
                            UploadProcessingMsg="请等待....." TableHeaderTemplate="<td nowrap='nowrap'></td><td>文件列表</td>" 
                            ShowProgressBar="True" NumFilesShowCancelAll="100" ProgressBarBackgroundImage="image/bar.gif" ProgressBarHeight="14">
                            <ValidateOption AllowedFileExtensions="jpeg,jpg,gif,png,pdf,doc,docx,xls,xlsx,mpg" />            
                            <InsertButtonStyle CssClass="bigButton" />
                            <CancelButtonStyle CssClass="SmallButton" />
                         </CuteWebUI:UploadAttachments>
                    </div>