diff --git a/template/hide.html b/template/hide.html
new file mode 100644
index 0000000..76cdf95
--- /dev/null
+++ b/template/hide.html
@@ -0,0 +1,28 @@
+<script>
+  function unhide(seed, arr) {
+    seed %= 1000000007;
+    const str_arr = [];
+    for (let i = 0; i < arr.length; i++) {
+      str_arr.push((((arr[i] - seed) % 256) + 256) % 256)
+      seed = seed * seed % 1000000007;
+    }
+
+    const ui8_arr = new Uint8Array(str_arr);
+    const str = new TextDecoder().decode(ui8_arr);
+    return str;
+  }
+
+  function unhide_permalink() {
+    let anchors = document.querySelectorAll("a[hidden_permalink][seed]")
+    for (let anchor of anchors) {
+      let arr = new Array();
+      for (let n of anchor.getAttribute("hidden_permalink").split(",")) {
+        arr.push(Number(n));
+      };
+
+      let seed = Number(anchor.getAttribute("seed"))
+
+      anchor.href = unhide(seed, arr);
+    }
+  }
+</script>
diff --git a/template/index.html.njk b/template/index.html.njk
index 65b9772..41d7a5c 100644
--- a/template/index.html.njk
+++ b/template/index.html.njk
@@ -1,37 +1,5 @@
 <!DOCTYPE html>
 
-{% macro unhide_func() %}
-<script>
-  function unhide(seed, arr) {
-    seed %= 1000000007;
-    const str_arr = [];
-    for (let i = 0; i < arr.length; i++) {
-      str_arr.push((((arr[i] - seed) % 256) + 256) % 256)
-      seed = seed * seed % 1000000007;
-    }
-
-    const ui8_arr = new Uint8Array(str_arr);
-    const str = new TextDecoder().decode(ui8_arr);
-    return str;
-  }
-
-  function unhide_permalink() {
-    let anchors = document.querySelectorAll("a[hidden_permalink][seed]")
-    for (let anchor of anchors) {
-      let arr = new Array();
-      for (let n of anchor.getAttribute("hidden_permalink").split(",")) {
-        arr.push(Number(n));
-      };
-
-      let seed = Number(anchor.getAttribute("seed"))
-
-      anchor.href = unhide(seed, arr);
-    }
-  }
-</script>
-{% endmacro %}
-
-
 {% macro render_item(item) %}
 
 {% set class_str = "item" %}
@@ -84,7 +52,7 @@
     <meta name="viewport" content="width=device-width,minimum-scale=1">
     <link ref="canonical" href="{{canonical_link}}" />
 
-    {{ unhide_func() }}
+    {% include "hide.html" %}
   </head>
 
 <style>{% include "reset.css" %}</style>
