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slotNumber=this.getTargetPhotoSlotNumber();if(!slotNumber){return null;}return this.getPhotoUploadContainerSlot(slotNumber);},showMaxUploadMessage:function(){receivingWindow.document.getElementById(displayPrefix+"PhotoUploadControlsID").style.display="none";receivingWindow.document.getElementById(displayPrefix+"PhotoUploadMaximumImagesID").style.display="block";},hideMaxUploadMessage:function(){receivingWindow.document.getElementById(displayPrefix+"PhotoUploadControlsID").style.display="block";receivingWindow.document.getElementById(displayPrefix+"PhotoUploadMaximumImagesID").style.display="none";},firstVacantUploadSlotNumber:function(){var max=this.getNumberOfMaximumPhotoUploads();var current;for(current=1;current<=max;current++){var candidate=this.editForm().elements["photourl_"+current];if(candidate&&candidate.value==""){return current;}}return null;},lastOccupiedUploadSlotNumber:function(){var max=this.getNumberOfMaximumPhotoUploads();var current;for(current=max;current>0;current--){var candidate=this.editForm().elements["photourl_"+current];if(candidate&&candidate.value!=""){return current;}}return null;},showNextRowIfPossible:function(firstSlotIndexInRow){if(this.editForm()){var secondSlotIndexInRow=(firstSlotIndexInRow+1);var rowUrl1Element=this.editForm().elements["photourl_"+firstSlotIndexInRow];var rowUrl2Element=this.editForm().elements["photourl_"+secondSlotIndexInRow];if((rowUrl1Element&&rowUrl1Element.value=="")&&(rowUrl2Element&&rowUrl2Element.value=="")){var slot1=this.getPhotoUploadContainerSlot(firstSlotIndexInRow);slot1.style.display="block";this.showSameFieldMessageInSlotIfEmpty(secondSlotIndexInRow);}}},showWaitingMessageInTargetUploadSlot:function(){this.showInSlotIfEmpty("PleaseWaitMessageID",this.getTargetPhotoSlotNumber());},showAdditionalFieldMessageInSlotIfEmpty:function(slotNumber){this.showInSlotIfEmpty("AdditionalPhotoMessageID",slotNumber);},showSameFieldMessageInSlotIfEmpty:function(slotNumber){this.showInSlotIfEmpty("SameFieldMessageID",slotNumber);},showInSlotIfEmpty:function(unprefixedElementId,slotNumber){var urlElement=this.editForm().elements["photourl_"+slotNumber];if(urlElement&&urlElement.value==""){var slot=this.getPhotoUploadContainerSlot(slotNumber);if(slot){var urlElementClone=urlElement.cloneNode(true);var 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