remove duplicates

index.js

@@ -203,8 +203,24 @@ function showImages(word) {
 
     var now_count = tmp_tabl.length;
 
+    var tmp2_tabl = [];
+    tmp_tabl.forEach((element) => {
+        if (!tmp2_tabl.includes(element)) {
+            tmp2_tabl.push(element);
+        }
+    });
+    tmp_tabl = tmp2_tabl;
+
+
     while (now_count < tocount){
-        tmp_tabl.push(getRandomElement(data_tabl));
+        var hasORiginal = false;
+        while(!hasORiginal){
+            var newthing = getRandomElement(data_tabl); 
+            if (!tmp_tabl.includes(newthing)){
+                tmp_tabl.push(newthing);
+                hasORiginal = true;
+            }
+        }
         now_count++;
     }