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<html>     
<head>     
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">     
<title>checkbox tree</title>     
<link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />     
<script type="text/javascript" src="../../adapter/ext/ext-base.js"></script>     
<script type="text/javascript" src="../../ext-all.js"></script>     
    
<script type="text/javascript">

 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 : "Extjs",
                        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 : "root",
                        checked : false
                    });
            for (var j = 1; j < 4; ++j) {
                var node = root.appendChild(new Ext.tree.TreeNode({
                            text : 'company_A' + j,
                            allowDrag : false,
                            checked : false
                        }));
                for (var n = 1; n < 4; ++n) {
                    node.appendChild(new Ext.tree.TreeNode({
                                text : 'items' + 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 : "checked_id",
                        handler : function() {
                            var b = mytree.getChecked();
                            var checkid = new Array;
                            for (var i = 0; i < b.length; i++) {
                                checkid.push(b[i].text);
                            }
                            alert(checkid.toString());
                        }
                    }).render(document.body, "btn");

        });

  
</script>     
    
</head>     
<body>     
<h1>Tree</h1>     
<div id="container" style="overflow:auto; height:300px;width:250px;border:1px solid

#c3daf9;"></div>     
    
</body>     
</html>

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