diff --git a/js/tsa.js b/js/tsa.js
index b41140b25ad056f191c10f9ddcb418b12222e94e..21d57db8b6de1bac3a2bc1d5820951b37d71dcb1 100644
--- a/js/tsa.js
+++ b/js/tsa.js
@@ -260,20 +260,22 @@ function ots_check(file) {
 }
 
 
-
-
-
 function allowDrop(e) {
     e.preventDefault();
 }
 
+function dropStamp(e) {
+    e.preventDefault();
+    var file = e.dataTransfer.items[0].getAsFile();
+    stamp(file);
+}
+
 function dropOTSFile(e) {
     e.preventDefault();
     var file = e.dataTransfer.items[0].getAsFile();
     ots_check(file);
 }
 
-
 function dropOriginalFile(e) {
     e.preventDefault();
     var file = e.dataTransfer.items[0].getAsFile();