diff --git a/app/templates/listings/form.html b/app/templates/listings/form.html
index d1bb6cf..d8b392d 100644
--- a/app/templates/listings/form.html
+++ b/app/templates/listings/form.html
@@ -66,7 +66,11 @@
   var groups = document.querySelectorAll('.attr-group');
   function sync(){
     groups.forEach(function(g){
-      g.style.display = (g.dataset.cat === sel.value) ? 'block' : 'none';
+      var visible = g.dataset.cat === sel.value;
+      g.style.display = visible ? 'block' : 'none';
+      g.querySelectorAll('input,select,textarea').forEach(function(el){
+        el.disabled = !visible;
+      });
     });
   }
   if (sel){ sel.addEventListener('change', sync); sync(); }