Unnamed

<toolbarbutton id="rsworldload-toolbar-button"
    oncommand="rsworldload.onToolbarButtonCommand()"
    class="toolbarbutton-1 chromeclass-toolbar-additional"
    type="menu">
     <menupopup id="file-popup">
        <menu id="new-menu" label="New">
          <menupopup id="new-popup">
            <menuitem label="Window"/>
            <menuitem label="Message"/>
          </menupopup>
        </menu>
        <menuitem label="Open"/>
        <menuitem label="Save"/>
        <menuseparator/>
        <menuitem label="Exit"/>
      </menupopup>
   </toolbarbutton>