+  $.post("controller.pl", data, kivi.eval_json_result);
+
+  return true;
+};
+
+// -------------------------------------------------------------------------
+// -------------------------- 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;
+};
+
+// -------------------------------------------------------------------------
+// ----------------------------- context menus -----------------------------
+// -------------------------------------------------------------------------
+
+ns.create_context_menus = function(data) {
+  var general_actions;
+  if (data.is_template) {
+    general_actions = {
+        sep98:           "---------"
+      , general_actions: { name: kivi.t8('Requirement spec template actions'), className: 'context-menu-heading' }
+      // , sep99:           "---------"
+      , copy_reqspec:    { name: kivi.t8('Copy template'),   icon: "copy",   callback: kivi.requirement_spec.copy_reqspec   }
+      , delete_reqspec:  { name: kivi.t8('Delete template'), icon: "delete", callback: kivi.requirement_spec.delete_reqspec }
+      , sep_paste_template: "---------"
+      , renumber:        { name: kivi.t8('Renumber sections and function blocks'), icon: "renumber", callback: kivi.requirement_spec.renumber }
+    };
+
+    $.contextMenu({
+      selector: '.basic-settings-context-menu',
+      items:    $.extend({
+          heading: { name: kivi.t8('Basic settings actions'), className: 'context-menu-heading' }
+        , edit:    { name: kivi.t8('Edit'), icon: "edit", callback: kivi.requirement_spec.standard_basic_settings_ajax_call }
+      }, general_actions)
+    });
+
+  } else {                      // if (is_template)
+    general_actions = {
+        sep98:              "---------"
+      , general_actions:    { name: kivi.t8('Requirement spec actions'), className: 'context-menu-heading' }
+      , create_pdf:         { name: kivi.t8('Create PDF'),              icon: "pdf",    callback: kivi.requirement_spec.create_reqspec_pdf }
+      , create_html:        { name: kivi.t8('Create HTML'),             icon: "html",   callback: kivi.requirement_spec.create_reqspec_html }
+      , create_version:     { name: kivi.t8('Create new version'),      icon: "new",    callback: kivi.requirement_spec.create_version, disabled: kivi.requirement_spec.disable_commands }
+      , copy_reqspec:       { name: kivi.t8('Copy requirement spec'),   icon: "copy",   callback: kivi.requirement_spec.copy_reqspec   }
+      , delete_reqspec:     { name: kivi.t8('Delete requirement spec'), icon: "delete", callback: kivi.requirement_spec.delete_reqspec }
+      , sep_renumber:       "---------"
+      , renumber:           { name: kivi.t8('Renumber sections and function blocks'), icon: "renumber", callback: kivi.requirement_spec.renumber }
+      , sep_paste_template: "---------"
+      , paste_template:     { name: kivi.t8('Paste template'),     icon: "paste",  callback: kivi.requirement_spec.paste_template }
+    };
+
+    var versioned_copy_actions = {
+        heading:             { name: kivi.t8('Version actions'), className: 'context-menu-heading' }
+      , create_version_pdf:  { name: kivi.t8('Create PDF'),        icon: "pdf",    callback: kivi.requirement_spec.create_pdf_for_versioned_copy_ajax_call                                                                      }
+      , create_version_html: { name: kivi.t8('Create HTML'),       icon: "html",   callback: kivi.requirement_spec.create_html_for_versioned_copy_ajax_call                                                                     }
+      , revert_to_version:   { name: kivi.t8('Revert to version'), icon: "revert", callback: kivi.requirement_spec.revert_to_versioned_copy_ajax_call,     disabled: kivi.requirement_spec.disable_versioned_copy_item_commands }
+    };
+
+    if (!data.html_template_exists) {
+      delete general_actions.create_html;
+      delete versioned_copy_actions.create_version_html;
+    }
+
+    $.contextMenu({
+      selector: '.versioned-copy-context-menu',
+      items:    $.extend(versioned_copy_actions, general_actions)
+    });
+
+    $.contextMenu({
+      selector: ':has(> .basic-settings-context-menu:visible)',
+      items:    $.extend({
+          heading:           { name: kivi.t8('Basic settings actions'), className: 'context-menu-heading' }
+        , edit:              { name: kivi.t8('Edit'),              icon: "edit", callback: kivi.requirement_spec.standard_basic_settings_ajax_call }
+        , edit_project_link: { name: kivi.t8('Edit project link'),               callback: kivi.requirement_spec.standard_basic_settings_ajax_call }
+      }, general_actions)
+    });
+
+    $.contextMenu({
+      selector: ':has(> .edit-project-link-context-menu:visible)',
+      items:    $.extend({
+          heading: { name: kivi.t8('Project link actions'), className: 'context-menu-heading' }
+        , save:    { name: kivi.t8('Save'),   icon: "save",  callback: kivi.requirement_spec.standard_basic_settings_ajax_call }
+        , cancel:  { name: kivi.t8('Cancel'), icon: "close", callback: kivi.requirement_spec.standard_basic_settings_ajax_call }
+      }, general_actions)
+    });
+
+    var paste_template_actions = {
+    };
+  }                             // if (is_template) ... else ...
+