Update src/index.html

src/index.html

@@ -28,6 +28,20 @@
   <h3>Links</h3>
   <p>The links i use.</p>
 </div>
-  
+  <script>
+function openCity(evt, cityName) {
+  var i, tabcontent, tablinks;
+  tabcontent = document.getElementsByClassName("tabcontent");
+  for (i = 0; i < tabcontent.length; i++) {
+    tabcontent[i].style.display = "none";
+  }
+  tablinks = document.getElementsByClassName("tablinks");
+  for (i = 0; i < tablinks.length; i++) {
+    tablinks[i].className = tablinks[i].className.replace(" active", "");
+  }
+  document.getElementById(cityName).style.display = "block";
+  evt.currentTarget.className += " active";
+}
+</script>
 </body>
 </html>