dojo tree：program create tree

主要使用他做带有复选框的树，一次性从数据库得到数据，产生js代码，送到浏览器执行。复选框可以直接写到标题里面，注意复选框的id命名规则，合理的命名可以处理一些操作（比如，取消上级，则取消所有下级）。最后就是对一次读取数据库可以采用路径发和封闭法一次性读取树的所有数据，避免递归方式。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Dojo Tree Widget Test (dynamic node creation)</title>

dojo.require("dojo.widget.*");
dojo.require("dojo.widget.TreeV3");
dojo.require("dojo.widget.TreeNodeV3");
dojo.require("dojo.widget.TreeBasicControllerV3");
dojo.hostenv.writeIncludes();
</script>
<script type="text/javascript">

dojo.addOnLoad(function(){

  var controller = dojo.widget.createWidget("TreeBasicControllerV3");
  var tree = dojo.widget.createWidget("TreeV3", {listeners:[controller.widgetId]});

  document.body.appendChild(tree.domNode);

  varrootNode = dojo.widget.createWidget("TreeNodeV3", {title: "<inputtype=‘checkbox‘ class=‘TreeIcon‘ />Root Node", tree: tree.widgetId});

  tree.addChild(rootNode);

var node1 = dojo.widget.createWidget("TreeNodeV3", {title: "Node 1", tree: tree.widgetId});
rootNode.addChild(node1);

var node2 = dojo.widget.createWidget("TreeNodeV3", {title: "Node 1.2", tree: tree.widgetId});
node1.addChild(node2, null, "after");

rootNode.addChild(dojo.widget.createWidget("TreeNodeV3", {title: "Node 2", tree: tree.widgetId}));

  // Add some nodes the first element (rather than the last element) just for testing
  for(var i=1;i<5;i++) {
   node1.addChild(dojo.widget.createWidget("TreeNodeV3", {title: "Node 1."+i, tree: tree.widgetId}));
  }

tree.addChild(dojo.widget.createWidget("TreeNodeV3", {title: "Root Node 2", tree: tree.widgetId}));

});

</script>
</head>
<body>

<h4>Create tree programmatically</h4>

</body>
</html>

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