+// -------------------------------------------------------------------------
+// -------------------------- time/cost estimate ---------------------------
+// -------------------------------------------------------------------------
+
+ns.standard_time_cost_estimate_ajax_call = function(key, opt) {
+  if (key == 'cancel') {
+    if (confirm(kivi.t8('Do you really want to cancel?'))) {
+      $('#time_cost_estimate').show();
+      $('#time_cost_estimate_form_container').remove();
+    }
+    return true;
+  }
+
+  var add_data = '';
+  if (key == 'save_keep_open') {
+    key      = 'save';
+    add_data = 'keep_open=1&';
+  }
+
+  var data = "action=RequirementSpec/ajax_" + key + "_time_and_cost_estimate&" + add_data;
+
+  if (key == 'save')
+    data += $('#edit_time_cost_estimate_form').serialize()
+         +  '&' + $('#current_content_type').serialize()
+         +  '&' + $('#current_content_id').serialize();
+  else
+    data += 'id=' + encodeURIComponent($('#requirement_spec_id').val());
+
+  $.post("controller.pl", data, kivi.eval_json_result);
+
+  return true;
+};
+
+ns.time_cost_estimate_input_key_down = function(event) {
+  if(event.keyCode == 13) {
+    event.preventDefault();
+    ns.standard_time_cost_estimate_ajax_call('save');
+    return false;
+  }
+};
+
+// -------------------------------------------------------------------------
+// -------------------------- additional parts -----------------------------
+// -------------------------------------------------------------------------
+
+ns.standard_additional_parts_ajax_call = function(key, opt) {
+  var add_data = '';
+  if (key == 'save_keep_open') {
+    key      = 'save';
+    add_data = 'keep_open=1&';
+  }
+
+  var data = "action=RequirementSpecPart/ajax_" + key + "&" + add_data + 'requirement_spec_id=' + encodeURIComponent($('#requirement_spec_id').val()) + '&';
+
+  if (key == 'save')
+    data += $('#edit_additional_parts_form').serialize();
+
+  $.post("controller.pl", data, kivi.eval_json_result);
+
+  return true;
+};
+
+ns.prepare_edit_additional_parts_form = function() {
+  $("#edit_additional_parts_list tbody").sortable({
+    distance: 5,
+    handle:   '.dragdrop',
+    helper:   function(event, ui) {
+      ui.children().each(function() {
+        $(this).width($(this).width());
+      });
+      return ui;
+    }
+
+  });
+};
+
+ns.cancel_edit_additional_parts_form = function() {
+  if (confirm(kivi.t8('Do you really want to cancel?'))) {
+    $('#additional_parts_list_container').show();
+    $('#additional_parts_form_container').remove();
+  }
+  return true;
+};
+
+ns.additional_parts_input_key_down = function(event) {
+  if(event.keyCode == 13) {
+    event.preventDefault();
+    ns.standard_additional_parts_ajax_call('save');
+    return false;
+  }
+};
+
+ns.add_additional_part = function() {
+  var part_id = $('#additional_parts_add_part_id').val();
+  if (!part_id || (part_id == ''))
+    return false;
+
+  var rspec_id = $('#requirement_spec_id').val();
+  var data     = 'action=RequirementSpecPart/ajax_add&requirement_spec_id=' + encodeURIComponent(rspec_id) + '&part_id=' + encodeURIComponent(part_id);
+
+  $.post("controller.pl", data, kivi.eval_json_result);
+
+  return true;
+};
+
+ns.delete_additional_part = function(key, opt) {
+  opt.$trigger.remove();
+  if (!$('#edit_additional_parts_list tbody tr').size()) {
+   $('#edit_additional_parts_list_empty').show();
+   $('#edit_additional_parts_list').hide();
+  }
+
+  return true;
+};
+
+// -------------------------------------------------------------------------
+// ------------------------------- tab widget ------------------------------
+// -------------------------------------------------------------------------
+var content_div_ids_for_tab_headers = {
+    'tab-header-function-block':     'function-blocks-tab'
+  , 'tab-header-basic-settings':     'ui-tabs-1'
+  , 'tab-header-time-cost-estimate': 'ui-tabs-2'
+  , 'tab-header-additional-parts':   'ui-tabs-3'
+  , 'tab-header-versions':           'ui-tabs-4'
+  , 'tab-header-quotations-orders':  'ui-tabs-5'
+};
+
+ns.tabs_before_activate = function(event, ui) {
+  if (!ui.oldTab)
+    return true;
+
+  var content_div_id = content_div_ids_for_tab_headers[ $(ui.oldTab).attr('id') ];
+  if (!content_div_id || (content_div_id == 'function-blocks-tab'))
+    return true;
+
+  var inputs = $('#' + content_div_id).find('input,select,textarea').filter('[type!=hidden]');
+  if (!inputs.size() || confirm(kivi.t8("If you switch to a different tab without saving you will lose the data you've entered in the current tab.")))
+    return true;
+
+  var new_focus = $(inputs).filter(':focusable')[0];
+  if (new_focus)
+    $(new_focus).focus();
+
+  return false;
+};
+