diff --git a/public/static/js/mapguesser.js b/public/static/js/mapguesser.js
index 89a79a9..6e665c1 100644
--- a/public/static/js/mapguesser.js
+++ b/public/static/js/mapguesser.js
@@ -183,12 +183,23 @@ var MapGuesser = {
         document.getElementById('cover').style.visibility = 'hidden';
     },
 
-    observeInput: function (input, buttonToToggle) {
-        if (input.defaultValue !== input.value) {
-            buttonToToggle.disabled = false;
-        } else {
-            buttonToToggle.disabled = true;
+    observeInput: function (form, observedInputs) {
+        var anyChanged = false;
+
+        for (var i = 0; i < observedInputs.length; i++) {
+            var input = form.elements[observedInputs[i]];
+            if (input.type === 'checkbox') {
+                if (input.defaultChecked !== input.checked) {
+                    anyChanged = true;
+                }
+            } else {
+                if (input.defaultValue !== input.value) {
+                    anyChanged = true;
+                }
+            }
         }
+
+        form.elements['submit_button'].disabled = !anyChanged;
     },
 
     observeInputsInForm: function (form, observedInputs) {
@@ -199,19 +210,19 @@ var MapGuesser = {
                 case 'INPUT':
                 case 'TEXTAREA':
                     input.oninput = function () {
-                        MapGuesser.observeInput(this, form.elements.submit);
+                        MapGuesser.observeInput(form, observedInputs);
                     };
                     break;
                 case 'SELECT':
                     input.onchange = function () {
-                        MapGuesser.observeInput(this, form.elements.submit);
+                        MapGuesser.observeInput(form, observedInputs);
                     };
                     break;
             }
         }
 
         form.onreset = function () {
-            form.elements.submit.disabled = true;
+            form.elements['submit_button'].disabled = true;
         }
     }
 };
diff --git a/views/account/account.php b/views/account/account.php
index a2a31f1..e21ae64 100644
--- a/views/account/account.php
+++ b/views/account/account.php
@@ -29,7 +29,7 @@
             <input type="password" class="text big fullWidth marginTop" name="password_new_confirm" placeholder="New password confirmation" autocomplete="new-password" minlength="6">
             <p id="accountFormError" class="formError justify marginTop"></p>
             <div class="right marginTop">
-                <button type="submit" name="submit" disabled>Save</button>
+                <button type="submit" name="submit_button" disabled>Save</button>
             </div>
             <hr>
             <div class="center">
diff --git a/views/account/delete.php b/views/account/delete.php
index 864d3d5..60689fd 100644
--- a/views/account/delete.php
+++ b/views/account/delete.php
@@ -26,7 +26,7 @@
             <?php endif; ?>
             <p id="deleteAccountFormError" class="formError justify marginTop"></p>
             <div class="right marginTop">
-                <button class="red marginRight" type="submit" name="submit">Delete account</button><!--
+                <button class="red marginRight" type="submit" name="submit_button">Delete account</button><!--
              --><a class="button gray marginTop" href="/account" title="Back to account">Cancel</a>
             </div>
         </form>