File upload rich:fileUpload删除停止按钮

我正在使用rich:fileupload在应用程序中实现上传功能。我不想使用rich:fileupload标签提供的停止按钮。 是否有办法移除（或隐藏）停止按钮。 我试图将stopButtonClass设置为显示：无，它仍然显示一个小正方形-可能是周围div的边界

有人知道如何完全移除停止按钮吗？ 请给我指路

<rich:fileUpload  id="upload" fileUploadListener="#{fileUploadBean.listener}" maxFilesQuantity="#{fileUploadBean.uploadsAvailable}" 
                acceptedTypes="txt,ppt,jpg,doc,xls, gif, bmp,pdf"  ontyperejected="alert('Only TXT,PPT,DOC,XLS JPG, GIF,PDF and BMP files are accepted');"
                addControlLabel="Browse" listHeight="50px" listWidth="auto"   onsizerejected="alert('You can only upload upto 10MB files')" autoclear="false"
                immediateUpload="#{fileUploadBean.autoUpload}"  allowFlash="#{fileUploadBean.useFlash}" 
                stopButtonClass="rich-fileupload-ico-stop"  clearAllControlLabel="" clearControlLabel="" stopControlLabel="" 
                cleanButtonClass="rich-fileupload-ico-clear" cleanButtonClassDisabled="rich-fileupload-ico-clear" stopButtonClassDisabled="rich-fileupload-ico-stop">
                <a4j:support event="onuploadcomplete" reRender="uploadInfo" />
                <a4j:support event="onuploadcanceled" reRender="uploadInfo" />
            </rich:fileUpload>

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我通过设置按钮边框属性的display:none，修复了完全隐藏rich:fileUpload的停止按钮的问题。 下面是css的代码：

.rich-fileupload-button-border{ border:none ; }