siteTree = new NavTree();
var resNode = new NavTreeNode("res", "Resource Library", "/en/resource/index.html", "session");
siteTree.add(resNode);
var introNode = new NavTreeNode("intro", "Product Introduction", "/en/resource/introduct.html", "page");
var whitepaperNode = new NavTreeNode("whitepaper", "Whitepapers", "/en/whitepaper/index.html", "page");
var recommendNode = new NavTreeNode("recommend", "Recommended Resources", "/en/resource/recommend.html", "page");

siteTree.add(introNode);
siteTree.add(whitepaperNode);
siteTree.add(recommendNode);