<script type="text/javascript">
function onNodeGiveFeedBack(e) {
var node = e.node;
var targetnode = e.targetNode;
....
}
function onNodeBeforeDrop(e) {
var treeGrid = e.sender;
var node = e.dragNode;
var targetNode = e.dropNode;
alert(node.ParentUID);
alert(targetNode.ParentUID); }