How to get ASP Treeview selected node value using Javascript

How to get ASP Treeview selected node value using Javascript

  function GetSelectedTreeNode() {

        debugger;

        var treeViewData = window["<%=trviewFolders.ClientID%>" + "_Data"];

        if (treeViewData.selectedNodeID.value != "") {

            var selectedNode = document.getElementById(treeViewData.selectedNodeID.value);

            var value = selectedNode.href.substring(selectedNode.href.indexOf(",") + 3, selectedNode.href.length - 2);

            var text = selectedNode.innerHTML;

             alert("Display name: " + text + "\r\n" + "NodeValue: " + value);

           // gloSelectedNodeVal = text;

        }

        else {

          // alert("No node selected.")

        }

        return false;

    }