convert treeview data to json using jquery

<div id="tree">
   </div>

<script type="text/javascript"><!--
        $(function () {
         
            $("#tree").dynatree({
                initAjax: {
                    url: "sample-data3.json"
                },
                onLazyRead: function (node) {
         
                            });
                },
                dnd: {
                    onDragStart: function (node) {
                        logMsg("tree.onDragStart(%o)", node);
                        return true;
                    },
                    onDragStop: function (node) {

                        logMsg("tree.onDragStop(%o)", node);
                    },
                    autoExpandMS: 1000,
                    preventVoidMoves: true, 
                    onDragEnter: function (node, sourceNode) {
                      

                        logMsg("tree.onDragEnter(%o, %o)", node, sourceNode);
                        return true;
                    },
                    onDragOver: function (node, sourceNode, hitMode) {
                       
                        logMsg("tree.onDragOver(%o, %o, %o)", node, sourceNode, hitMode);
                       
                        if (node.isDescendantOf(sourceNode) && sourceNode.parent.data.title != node.parent.data.title) {
                            return false;
                        }
                       
                        if (!node.data.isFolder && hitMode === "over") {
                            return "after";
                        }
                    },
                    onDrop: function (node, sourceNode, hitMode, ui, draggable) {
                      
                        if (node.parent.data.title != sourceNode.parent.data.title)
                            return;
                        if (hitMode == 'over')
                            hitMode = 'before';

                        logMsg("tree.onDrop(%o, %o, %s)", node, sourceNode, hitMode);

                        sourceNode.move(node, hitMode);
                       
                    },
                    onDragLeave: function (node, sourceNode) {
                         logMsg("tree.onDragLeave(%o, %o)", node, sourceNode);
                    }
                }
            });
        }
        );
--></script>