js 实现子树选中时父目录全被选中

  

 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+"." ;
             
          }
         }

this.TreeView1 .Attributes.Add ("oncheck","change()");

树在客户端代码始如下
 1  
      1.1 
       1.2
           1.2.1