Change the height of the upload pane.

 <script type="text/javascript">
   //<![CDATA[
   //Create JavaScript object that will embed Image Uploader to the page.
   var iu = new ImageUploaderWriter("ImageUploader1", 740, 400);

   //For ActiveX control full path to CAB file (including file name) should be specified.
   iu.activeXControlCodeBase = "upload/ImageUploader5.cab";
   iu.activeXControlVersion = "5,1,1,0";
   iu.addParam("TimeOut", "0");

   //For Java applet only path to directory with JAR files should be specified (without file name).
   iu.javaAppletJarFileName = "upload/ImageUploader5.jar";
   iu.javaAppletCodeBase = "./";
   iu.javaAppletCached = true;
   iu.javaAppletVersion = "5.1.1.0";

   iu.showNonemptyResponse = "off";

   //Apparence de l'applet.
   iu.addParam("PaneLayout", "ThreePanes");
   iu.addParam("ShowDebugWindow", "false");
   iu.addParam("AllowRotate", "true");
   iu.addParam("BackgroundColor", "#ccccff");
   iu.addParam("ShowButtons", "false");
   iu.addParam("ShowDescriptions", "false");

   //Paramtres des boutons
   iu.addParam("ButtonSelectAllText", "Selectionner tout");
   iu.addParam("ButtonDeselectAllText", "Déselectionner tout");
   iu.addParam("ButtonSendText", "Transferer");
   iu.addParam("ButtonAddToUploadListText", "Ajouter");
   iu.addParam("ButtonAddAllToUploadListText", "Ajouter tout");
   iu.addParam("ButtonRemoveFromUploadListText", "Supprimer");
   iu.addParam("ButtonRemoveAllFromUploadListText", "Supprimer tout");

   //Parametres du menu clic droit
   iu.addParam("MenuThumbnailsText", "Miniatures");
   iu.addParam("MenuDetailsText", "Détails");
   iu.addParam("MenuListText", "Liste");
   iu.addParam("MenuIconsText", "Icônes");
   iu.addParam("MenuSelectAllText", "Sélectionner tout");
   iu.addParam("MenuDeselectAllText", "Déselectionner tout");
   iu.addParam("MenuInvertSelectionText", "Inverser la sélection");
   iu.addParam("MenuAddToUploadListText", "Ajouter à la liste d'envoi");
   iu.addParam("MenuAddAllToUploadListText", "Tout ajouter à la liste d'envoi");

   

   //Configure License Keys
   iu.addParam("LicenseKey", "licence");

   //Configure thumbnail settings.
   iu.addParam("UploadThumbnail1FitMode", "Fit");
   iu.addParam("UploadThumbnail1Width", "150");
   iu.addParam("UploadThumbnail1Height", "150");
   iu.addParam("UploadThumbnail1JpegQuality", "100");
   iu.addParam("UploadThumbnail1CopyExif", "true");

   //Configure URL files are uploaded to.
   iu.addParam("Action", "upload/upload.php?rep=<?php echo $rep; ?>")

   //Configuration de la fenetre de progression et de la msgbox
   iu.addParam("ProgressDialogTitleText", "Envoi de vos photos en cours");
   iu.addParam("MessageBoxTitleText", Envoi de vos photos terminé");
   iu.addParam("DropFilesHereText", "Glissez vos photos ici");
   iu.addParam("LoadingFilesText", "Chargement des photos...");
   iu.addParam("ProgressDialogPreparingDataText", "Préparation des photos...");
   iu.addParam("ProgressDialogWaitingForResponseFromServerText", "Attente d'une réponse du serveur...");
   iu.addParam("ProgressDialogSentText", "Octets envoyés: [Current] sur [Total]");
   iu.addParam("ProgressDialogEstimatedTimeText", "Temps écoulé: [Current] Temps total: [Total]");
   iu.addParam("HoursText", "heures");
   iu.addParam("MinutesText", "minutes");
   iu.addParam("SecondsText", "secondes");
   iu.addParam("ProgressDialogCancelButtonText", "Annuler");
   iu.addParam("ProgressDialogCloseWhenUploadCompletesText", "Fermer cette fenêtre une fois l'envoi terminé");
   iu.addParam("MessageUploadCompleteText", "L'envoi de vos photos est terminé.");

   //Configure URL where to redirect after upload.
   iu.addParam("RedirectUrl", "index.php?p=galerie&rep=<?php echo $rep; ?>")

   //Tell Image Uploader writer object to generate all necessary HTML code to embed 
   //Image Uploader to the page.
   iu.writeHtml();
   //]]>
  </script>