Disable tree node

how do i disable tree node ,the tree is attached to an accordian as
var tree = dhxAccord.cells(“a1”).attachTree();




ReportTree.xml is

<?xml version="1.0" encoding="iso-8859-1"?>

 <item   text=“Reports” id=“reports” >
  <item text=“Reg/UnReg Properties”  id=“regproperty”>
  <item text=“Top 50”  id=“top50”>
  <item text=“BDR”  id=“bdr”>

i want to disable node Top 50 during office hours 6am to 6pm , please suggest  me sonmething



You can use dhtmlxtree_li.js extension and
<item text=“Top 50” id=“top50” locked=“true”>