var Tree = Ext.tree;
var tree = new Tree.TreePanel({
el:'tree-div',
useArrows:true,
autoScroll:true,
animate:true,
enableDD:true,
containerScroll: true,
loader: new Tree.TreeLoader({
dataUrl:'treecheckjson.jsp'
});
tree.on('checkchange', function(node, checked) {
node.expand();
node.attributes.checked = checked;
node.eachChild(function(child) {
child.ui.toggleCheck(checked);
child.attributes.checked = checked;
child.fireEvent('checkchange', child, checked);
}, tree);
var root = new Tree.AsyncTreeNode({
text: 'Ext JS',
draggable:false,
checked:false,
id:'0'
tree.setRootNode(root);
tree.render();
root.expand();
//带复选框(checkbox)的树
//改编自ExtJs 自带的tree例子，选中父节点后，所有子节点会自动选上。
var checkedNodes = tree.getChecked();//tree必须事先创建好.
var s = [];
for(var i=0;i<checkedNodes.length;i++){
s.push(checkedNodes[i].id)
} //得到里面选中的node id 值数组
