added condition to not show the text null when the listbox navigation is empty

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41398 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_web_ung_theme/SkinTemplateItem/portal_skins/erp5_web_ung_theme/ung_js/ung.js.xml

@@ -152,6 +152,8 @@ $(document).ready(function(){\n
      var height = tr_length * 1.5;\n
      $("div.main-right tbody").css("height", height + "em");\n
    }\n
+   if ($("div.listbox-navigation").text() == "null")\n
+     $("div.listbox-navigation").hide();\n
  }\n
  $("#edit_document").dialog({\n
     autoOpen: false,\n

bt5/erp5_web_ung_theme/bt/revision

-120
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+121
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