dropdown menu, and fixes

static/script.js

@@ -28,3 +28,21 @@ function hidetoggle(name) {
         }}
     }
 }
+function dropDown() {
+    document.getElementById("Dropdown").classList.toggle("show");
+}
+
+// Close the dropdown menu if the user clicks outside of it
+window.onclick = function(event) {
+  if (!event.target.matches('.dropbtn')) {
+
+    var dropdowns = document.getElementsByClassName("dropdown-content");
+    var i;
+    for (i = 0; i < dropdowns.length; i++) {
+      var openDropdown = dropdowns[i];
+      if (openDropdown.classList.contains('show')) {
+        openDropdown.classList.remove('show');
+      }
+    }
+  }
+}