diff --git a/assets/script.js b/assets/script.js
index 76c1bd7..f5482fd 100644
--- a/assets/script.js
+++ b/assets/script.js
@@ -581,19 +581,21 @@ async function getFileList() {
     let xhr = new XMLHttpRequest();
     xhr.open('POST', '/upload', true);
 
+    let tmp;
     xhr.onload = function () {
         if (xhr.status === 200) {
             const resp = JSON.parse(xhr.responseText);
             if (resp.Status == "Success") {
-                return resp.Files;
+                tmp = resp.Files;
             }
             else {
-                return false;
+                tmp = false;
             }
         }
     };
-
     xhr.send(formData);
+    while (tmp === undefined);
+    return tmp;
 }
 
 async function listFiles() {