diff --git a/js/spa.js b/js/spa.js
new file mode 100644
index 0000000..703a6b4
--- /dev/null
+++ b/js/spa.js
@@ -0,0 +1,16 @@
+addEventListener('hashchange', (event) => { 
+    setPage();
+});
+function setPage(){
+    document.querySelectorAll('.spapage').forEach(e=>{
+        e.hidden=true;
+    });
+    var hash=window.location.hash.replace('#','');
+    if(hash.length === 0)
+    {
+        hash="index";
+    }
+    
+    document.getElementById(hash).hidden=false;
+}
+setPage();