//根据当前节点选中父节点及其子节点 tree.on('checkchange', function(node, flag) {    //获取所有子节点    node.cascade( function( node ){    node.attributes.checked = flag;    node.ui.checkbox.checked = flag;    return true;     });    //获取所有父节点    var pNode = node.parentNode;    for(; pNode.id !="root"; pNode = pNode.parentNode ){       if (flag || tree.getChecked(id, node.parentNode) == "") {             pNode.ui.checkbox.checked = flag;             pNode.attributes.checked = flag;       }      } });

 if($_POST['node']=='root'){ //传递的参数是以POST方式的node,值为id的值.   //这里可以从数据库中取数据,然后构建成JSON格式.      //checked：显示复选框 true默认选中，false默认不选中   $s="[{id:'1',text:'not leaf',checked:false,children:[{id:'3',text:'is leaf',leaf:true,checked:false},                {id:'4',text:'is leaf',leaf:true,checked:false},               {id:'5',text:'is leaf',leaf:true,checked:false}]},               {id:'2',text:'is leaf',leaf:true,checked:false},               {id:'6',text:'not leaf',checked:false,children:[{id:'8',text:'is leaf',leaf:true,checked:false},               {id:'9',text:'not leaf',checked:false,children:[{id:'11',text:'is leaf',leaf:true,checked:false},               {id:'12',text:'is leaf',leaf:true,checked:false},               {id:'13',text:'is leaf',leaf:true,checked:false}]},               {id:'10',text:'is leaf',leaf:true,checked:false}]},               {id:'7',text:'not leaf',checked:false}]";  }  else{   $s='';  }  echo $s;