diff --git a/index.html b/index.html
index 9fb6740..1737192 100644
--- a/index.html
+++ b/index.html
@@ -234,5 +234,6 @@ <h2 class="data-error__title">Не удалось загрузить данны
       </section>
     </template>
 
+    <script src="/js/functions.js"></script>
 </body>
 </html>
diff --git a/js/functions.js b/js/functions.js
new file mode 100644
index 0000000..038eb98
--- /dev/null
+++ b/js/functions.js
@@ -0,0 +1,22 @@
+function checkStringLength (string, maxLength) {
+  const currentLength = string.length;
+
+  if (currentLength <= maxLength) {
+    return true;
+  }
+
+  return false;
+}
+
+function checkPalindrome (str) {
+  const normalizedString = str.toLowerCase().replaceAll(' ', '');
+  let newString = '';
+  const currentLength = normalizedString.length;
+
+  for (let currentIndex = currentLength - 1; currentIndex >= 0; currentIndex--) {
+    let currentSymbol = normalizedString[currentIndex];
+    newString += currentSymbol;
+  }
+
+  return(newString === normalizedString);
+}