jquery uploadify 在FF下无效的解决办法

$('#file_upload').uploadify({ buttonImage: '${ctx }/commons/uploaddify/img/browse-btn.png', swf :'${ctx }/commons/uploaddify/uploadify.swf', uploader :'../servlet/defaultDispatcher;jsessionid=${pageContext.session.id}?__action=xxx', fileTypeExts: '*.jpg;*.png;*.gif;*.bmp', fileTypeDesc: '图像文件', formData: { timestamp: new Date().getTime() }, onSelect: function(file){ //重写校验 }, onUploadProgress: function(file,bytesUploaded,bytesTotal,totalBytesUploaded,totalBytesTotal){ $('#pregress').html('总共需要上传'+bytesTotal+'字节，'+'已上传'+totalBytesTotal+'字节'); }, onUploadSuccess: function(file){ //上传成功 } });