diff --git a/js/main.js b/js/main.js
index 2941798..3090a97 100644
--- a/js/main.js
+++ b/js/main.js
@@ -28,12 +28,15 @@ function openPage(page, new_url, renew_history) {
         return;
     }
     slideOpacity(function () {
-        document.getElementById(window.currPage + "-link").children[0].className = "";
+        var link = document.getElementById(window.currPage + "-link");
+        if (link) {
+            link.children[0].className = "";
+            link.children[0].className = "active";
+        }
         document.getElementById(window.currPage).className = "hiddenarea";
         window.currPage = page;
         document.getElementById(page).style.opacity = "0";
         document.getElementById(page).className = "";
-        document.getElementById(page + "-link").children[0].className = "active";
         var target = new_url || page;
         var targetPg = "/" + target;
         if (target == "about") {
diff --git a/ts/main.ts b/ts/main.ts
index 263bb49..b764b29 100644
--- a/ts/main.ts
+++ b/ts/main.ts
@@ -41,12 +41,16 @@ function openPage(page: string, new_url: string = null, renew_history=true) {
    if (page == window.currPage) { return; }
 
    slideOpacity(() => {
-      document.getElementById(window.currPage + "-link").children[0].className = ""
+      let link = document.getElementById(window.currPage + "-link");
+      if (link) {
+         link.children[0].className = ""
+         link.children[0].className = "active"
+      }
+
       document.getElementById(window.currPage).className = "hiddenarea";
       window.currPage = page;
       document.getElementById(page).style.opacity = "0";
       document.getElementById(page).className = "";
-      document.getElementById(page + "-link").children[0].className = "active"
       let target = new_url || page;
       let targetPg = "/" + target;
       if (target == "about") { target = ""; targetPg = ""; };