Ext.TreePanel 树形目录显示复选框

treenode.js

Ext.onReady(function() {
            Ext.QuickTips.init();
            Ext.BLANK_IMAGE_URL 
= "extjs/resources/images/default/s.gif";
            
var mytree = new Ext.tree.TreePanel({
                        el : 
"container",
                        animate : 
true,
                        title : 
"简单Extjs动态树",
                        collapsible : 
true,
                        enableDD : 
true,
                        enableDrag : 
true,
                        rootVisible : 
true,
                        autoScroll : 
true,
                        autoHeight : 
true,
                        width : 
150,
                        lines : 
true
                    });

            
// 根节点
            var root = new Ext.tree.TreeNode({
                        id : 
"root",
                        text : 
"根节点",
                        checked : 
false
                    });
            
for (var j = 1; j < 4++j) {
                
var node = root.appendChild(new Ext.tree.TreeNode({
                            text : 
'客户企业A' + j,
                            allowDrag : 
false,
                            checked : 
false
                        }));
                
for (var n = 1; n < 4++n) {
                    node.appendChild(
new Ext.tree.TreeNode({
                                text : 
'栏目' + n,
                                allowDrag : 
false,
                                checked : 
false
                            }));
                }
            }
            mytree.setRootNode(root);
            mytree.render();
            mytree.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);
                                });
                    }, mytree);
            
var button = new Ext.Button({
                        text : 
"选中id",
                        handler : 
function() {
                            
var b = mytree.getChecked();
                            
var checkid = new Array;// 存放选中id的数组
                            for (var i = 0; i < b.length; i++) {
                                checkid.push(b[i].text);
// 添加id到数组
                            }
                            alert(checkid.toString());
                        }
                    }).render(document.body, 
"btn");

        });

treenode.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    
<head>
        
<title>treenode复选框</title>

        
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
        
<meta http-equiv="description" content="this is my page">
        
<meta http-equiv="content-type" content="text/html; charset=UTF-8">

        
<link href="extjs/resources/css/ext-all.css" rel="stylesheet"
            type
="text/css" />
        
<script src="extjs/adapter/ext/ext-base.js" type="text/javascript"></script>
        
<script src="extjs/ext-core.js" type="text/javascript"></script>
        
<script src="extjs/ext-all.js" type="text/javascript"></script>
        
<script type="text/javascript" src="treenode.js"></script> 
    
</head>

    
<body>
        
<div id="container">
        
</div>
        
<br />
        
<br />
        
<div id="btn"></div>  
    
</body>
</html>

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