title: Open new Window in NW.js without menubar
body: <p>Hi I have an app using NW.JS and angularjs. But the problem is, I want to open a new window (that loads a new page from within the app) without inheriting the menubar from the main window's menu. Is this possible in nwjs? Also every time I click the menu item from main window menubar that triggers the opening of new window it always open new window. How can I prevent this? I mean, when I already open the new window, the app should refrain from opening it again unless it was already closed.</p>
  
  <p>in my index.html</p>
  
  <pre><code>var menu = new nw.Menu({ type: 'menubar' });
  
  var submenu = new nw.Menu();
  submenu.append(new nw.MenuItem({
      label: 'Exit',
      click: function(){
          nw.App.quit();
      }
  }));
  
  menu.append(new nw.MenuItem({
      label: 'File',
      submenu: submenu
  }));
  menu.append(new nw.MenuItem({
      label: 'New Page',
      click: function(){
          nw.Window.open('index.html#/new_page')
      }
  }));
  
  nw.Window.get().menu = menu;
  </code></pre>