--- loncom/javascriptlib/file_upload.js	2019/08/11 14:16:55	1.3
+++ loncom/javascriptlib/file_upload.js	2023/07/11 22:24:30	1.4
@@ -2,7 +2,7 @@
 The LearningOnline Network with CAPA
 JavaScript functions handling file uploading
 
-$Id: file_upload.js,v 1.3 2019/08/11 14:16:55 raeburn Exp $
+$Id: file_upload.js,v 1.4 2023/07/11 22:24:30 raeburn Exp $
 
 Copyright Michigan State University Board of Trustees
 
@@ -105,6 +105,11 @@ INPUT:
 
     The PREFIX is empty unless the resource is within a composite page.
 
+    For upload to "IMS upload" in Main Content or "Upload File" in 
+    Supplemental Content in the Course Editor, the SUFFIX is extracted 
+    from the id of the file upload element, by splitting the id on
+    underscore, and using the second element.
+
 */
 function getMaxSize (fileInput,sizeItem) {
     var maxSize = 0;
@@ -118,6 +123,13 @@ function getMaxSize (fileInput,sizeItem)
             if (found.length == 3) {
                 sizeId = found[1]+sizeItem+'_'+found[2];
             }
+        } else if ($(fileInput).hasClass("LC_uploaddoc")) {
+            uploadId = $(fileInput).attr('id');
+            var re = /^uploaddoc(.+)$/;
+            var found = uploadId.match(re);
+            if (found.length == 2) {
+                sizeId = sizeItem+'_'+found[1]; 
+            }
         }
         if ( $("#"+sizeId).length) {
             if ( $("#"+sizeId).val() > 0) {