index.html.in: display a special error message if origin == destination

diff --git a/index.html.in b/index.html.in
index ac8b2befd2fa04818f6e47fddf15e2ddaf101693..50131b7cf32464739fe5bccc2eb13ef695b48fac 100644 (file)
--- a/index.html.in
+++ b/index.html.in
@@ -830,7 +830,11 @@
           x.setCustomValidity('');
         })
 
-        if (compute_marc_zone(src.value, dest.value) === null) {
+        if (src.value === dest.value) {
+          let err = "Origin and destination are the same!";
+          dest.setCustomValidity(err);
+        }
+        else if (compute_marc_zone(src.value, dest.value) === null) {
           let err = "Origin and destination are on different lines!";
           dest.setCustomValidity(err);
         }