function change() { var clickedNodeIndex=TreeView1.clickedNodeIndex; var choose; if (TreeView1.getTreeNode(clickedNodeIndex).getAttribute('Checked')) { choose=true; } else { choose=false; } var temp=new Array(); temp=clickedNodeIndex temp=temp+""; var bbb=temp.split("."); var check=''; for ( i=0;i<bbb.length;i++) { check=check+bbb[i]; // alert(check) ; TreeView1.getTreeNode(check).setAttribute('Checked',choose); check=check+"." ; } }