Improved shortcut handling

static/js/shortcut.js

@@ -1,19 +1,32 @@
-var checkedGroups = 0;
+var checkedGroups = [1,2,3,4,5];
+var countdownActive = false;
 
 function monitorRadio() {
     document.querySelectorAll('input[type="radio"]').forEach(function (el) {
-        el.addEventListener('change', incCounter, { once: true });
+        el.addEventListener('change', removeId, { once: true });
     });
 }
 
-function incCounter() {
-    checkedGroups++;
+function removeId(e) {
+    if (e) {
+        value = e.target.id.charAt(1);
+    } else {
+        value = checkedGroups[0];
+    }
+    checkedGroups = checkedGroups.filter(function(item) {
+        return item != value;
+    })
 }
 
 function checkCount() {
-    if (checkedGroups === 5) {
+    if (checkedGroups.length == 0) {
+        if (countdownActive == false) {
             countdown();
         }
+        countdownActive = true;
+        return true;
+    }
+    return false;
 }
 
 window.addEventListener("keydown", function (event) {
@@ -21,18 +34,22 @@ window.addEventListener("keydown", function (event) {
         return;
     }
 
-    checkCount();
+    if (checkCount()) {
+        return;
+    };
 
     switch (event.key) {
         case "a":
-            checkedGroups++;
-            getid = 'a'+checkedGroups;
+            value = checkedGroups[0];
+            removeId();
+            getid = 'a'+value;
             document.getElementById(getid).checked = true;
             checkCount();
             break;
         case "b":
-            checkedGroups++;
-            getid = 'b'+checkedGroups;
+            value = checkedGroups[0];
+            removeId();
+            getid = 'b'+value;
             document.getElementById(getid).checked = true;
             checkCount();
             break;