Add form.js

form.js

+function set_partition_change_handler() {
+  let partition_select = $("#batch_connect_session_context_bc_partition");
+  partition_select.change( function(e) {
+    toggle_gpu_visibility(e);
+  });
+}
+
+function toggle_gpu_visibility(event) {
+  const show = /pascalnodes/.test(event.target.value);
+  const selector = '#batch_connect_session_context_bc_num_gpus';
+  toggle_visibilty_of_form_group(selector, show);
+}
+
+function toggle_visibilty_of_form_group(form_id, show) {
+  let form_element = $(form_id);
+  let parent = form_element;
+
+  while (
+    (! parent[0].classList.contains('form-group')) &&
+    (! parent.is('html')) // ensure that we don't loop infinitely
+  ) {
+    parent = parent.parent();
+  }
+
+  // If parent is HTML then something has gone wrong and visibility should not be changed
+  if ( parent.is('html') ) {
+    return;
+  }
+
+  if(show) {
+    parent.show();
+  } else {
+    parent.hide();
+  }
+}
+
+toggle_gpu_visibility(
+  // Fake the event
+  { target: document.querySelector('#batch_connect_session_context_bc_num_gpus') }
+);
+set_partition_change_handler();