Jquery easyui tree

Jquery easyui tree 

function Travel(treeID){//参数为树的ID，注意不要添加#
   var roots=$('#'+treeID).tree('getRoots'),children,i,j;
   for(i=0;i<roots.length;i++){
     alert(roots[i].text);
     children=$('#'+treeID).tree('getChildren',roots[i].target);
     for(j=0;j<children.length;j++)alert(children[j].text);
   }
}     

 

       $(function(){
                $('#tt2').tree({
                    checkbox: true,
                    url: 'tree_data.json',
                    onClick: function(node){
                        $(this).tree('toggle', node.target);
                        //alert('you dbclick '+node.text);
                    },
                    onContextMenu: function(e, node){
                        e.preventDefault();
                        $('#tt2').tree('select', node.target);
                        $('#mm').menu('show', {
                            left: e.pageX,
                            top: e.pageY
                        });
                    }
                });
            });
            function reload(){
                var node = $('#tt2').tree('getSelected');
                if (node) {
                    $('#tt2').tree('reload', node.target);
                }
                else {
                    $('#tt2').tree('reload');
                }
            }
            
            function getChildren(){
                var node = $('#tt2').tree('getSelected');
                if (node) {
                    var children = $('#tt2').tree('getChildren', node.target);
                }
                else {
                    var children = $('#tt2').tree('getChildren');
                }
                var s = '';
                for (var i = 0; i < children.length; i++) {
                    s += children[i].text + ',';
                }
                alert(s);
            }
            
            function getChecked(){
                var nodes = $('#tt2').tree('getChecked');
                var s = '';
                for (var i = 0; i < nodes.length; i++) {
                    if (s != '') 
                        s += ',';
                    s += nodes[i].text;
                }
                alert(s);
            }
            
            function getSelected(){
                var node = $('#tt2').tree('getSelected');
                alert(node.text);
            }
            
            function collapse(){
                var node = $('#tt2').tree('getSelected');
                $('#tt2').tree('collapse', node.target);
            }
            
            function expand(){
                var node = $('#tt2').tree('getSelected');
                $('#tt2').tree('expand', node.target);
            }
            
            function collapseAll(){
                var node = $('#tt2').tree('getSelected');
                if (node) {
                    $('#tt2').tree('collapseAll', node.target);
                }
                else {
                    $('#tt2').tree('collapseAll');
                }
            }
            
            function expandAll(){
                var node = $('#tt2').tree('getSelected');
                if (node) {
                    $('#tt2').tree('expandAll', node.target);
                }
                else {
                    $('#tt2').tree('expandAll');
                }
            }
            
            function append(){
                var node = $('#tt2').tree('getSelected');
                $('#tt2').tree('append', {
                    parent: (node ? node.target : null),
                    data: [{
                        text: 'new1',
                        checked: true
                    }, {
                        text: 'new2',
                        state: 'closed',
                        children: [{
                            text: 'subnew1'
                        }, {
                            text: 'subnew2'
                        }]
                    }]
                });
            }
            
            function remove(){
                var node = $('#tt2').tree('getSelected');
                $('#tt2').tree('remove', node.target);
            }
            
            function update(){
                var node = $('#tt2').tree('getSelected');
                if (node) {
                    node.text = '<span style="font-weight:bold">new text<\/span>';
                    node.iconCls = 'icon-save';
                    $('#tt2').tree('update', node);
                }
            }
            
            function isLeaf(){
                var node = $('#tt2').tree('getSelected');
                var b = $('#tt2').tree('isLeaf', node.target);
                alert(b)
            }
            
            function GetNode(type){
                var node = $('#tt2').tree('getChecked');
                var chilenodes = '';
                var parantsnodes = '';
                var prevNode = '';
                for (var i = 0; i < node.length; i++) {
                
                    if ($('#tt2').tree('isLeaf', node[i].target)) {
                        chilenodes += node[i].text + ',';
                        
                        var pnode = $('#tt2').tree('getParent', node[i].target);
                        if (prevNode != pnode.text) {
                            parantsnodes += pnode.text + ',';
                            prevNode = pnode.text;
                        }
                    }
                }
                chilenodes = chilenodes.substring(0, chilenodes.length - 1);
                parantsnodes = parantsnodes.substring(0, parantsnodes.length - 1);
                
                if (type == 'child') {
                    return chilenodes;
                }
                else {
                    return parantsnodes
                };
                };
            function getNodes(){
                alert(GetNode('fnode') + "," + GetNode('child'));
            }
            
            function doNode(){
      var c="";
      var p="";
      $(".tree-checkbox1").parent().children('.tree-title').each(function(){
        c+=$(this).parent().attr('node-id')+",";
      });
       $(".tree-checkbox2").parent().children('.tree-title').each(function(){
     p+=$(this).parent().attr('node-id')+",";
      });
      var str=(c+p);
      str=str.substring(0,str.length-1);
      alert(str);
            }