diff --git a/app/static/js/fillword.js b/app/static/js/fillword.js
index bd5d5a2..f27a6be 100644
--- a/app/static/js/fillword.js
+++ b/app/static/js/fillword.js
@@ -9,11 +9,12 @@ function fillInWord() {
     let word = getWord();
     if (isRead) Reader.read(word, inputSlider.value);
     if (!isChoose) return;
-    let element = document.getElementById("selected-words");
-    let index = (String)(element.value).indexOf(word);
-    localStorage.setItem("nowWord",element.value);
+    const element = document.getElementById("selected-words");
+    let element1 = document.getElementById("selected-words");
+    let index = (String)(element1.value).indexOf(word);
+    localStorage.setItem("nowWord",element1.value);
     if(index === -1){
-        element.value = element.value + " " + word;
+        element1.value = element1.value + " " + word;
     }
 }