diff --git a/code/cms/DMSDocumentAddController.php b/code/cms/DMSDocumentAddController.php
index 1a6fa77..13a9f43 100644
--- a/code/cms/DMSDocumentAddController.php
+++ b/code/cms/DMSDocumentAddController.php
@@ -175,6 +175,10 @@ class DMSDocumentAddController extends LeftAndMain {
 		$page = $this->currentPage();
 		$document = DataObject::get_by_id('DMSDocument', (int) $_GET['documentID']);
 		$document->addPage($page);
+
+		return json_encode(array(
+			'iframe_url' => $this->getEditForm()->Fields()->fieldByName('Main.From your computer.AssetUploadField')->getItemHandler($document->ID)->EditLink()
+		));
 	}
 }
 
diff --git a/javascript/DMSDocumentAddExistingField.js b/javascript/DMSDocumentAddExistingField.js
index 912e48c..af440fe 100644
--- a/javascript/DMSDocumentAddExistingField.js
+++ b/javascript/DMSDocumentAddExistingField.js
@@ -8,7 +8,15 @@
 						var page_id = $(this).closest('form').find(':input[name=ID]').val();
 						var document_id = ui.item.value;
 
-						jQuery.ajax('admin/pages/adddocument/linkdocument?ID=' + page_id + '&documentID=' + document_id);
+						jQuery.ajax(
+							'admin/pages/adddocument/linkdocument?ID=' + page_id + '&documentID=' + document_id,
+							{
+								dataType: 'json',
+								success: function(data, textstatus) {
+									alert(data.iframe_url);
+								}
+							}
+						);
 					}
 				}
 			});