private void InitChildMenus(EO.Web.Menu topMenu)
{
    //Dynamically creates child menus based on top menu
    for (int i = 0; i < topMenu.Items.Count; i++)
        InitChildMenu(topMenu.Items[i].SubMenu);
}

private void InitChildMenu(EO.Web.MenuGroup subMenu)
{
    //Create a new menu
    EO.Web.Menu childMenu = new EO.Web.Menu();

    //Initialize the appearance setting for the new menu
    //For demonstrating purpose, this code gets the appearance
    //settings from one of the built-in template. If you have
    //customized settings, you will need to duplicate them all 
    //here with code.
    childMenu.ControlSkinID = "Office2003";

    //Add the child menu into the page
    childMenuPanel.Controls.Add(childMenu);
	
    //Copy menu items from the top menu to the child menu
    InitChildMenu(subMenu, childMenu.TopGroup);

    //Clear child items for the top menu
    subMenu.Items.Clear();
}

private void InitChildMenu(
    EO.Web.MenuGroup sourceGroup, EO.Web.MenuGroup targetGroup)
{
    //Copy menu items from sourceGroup to targetGroup
    for (int i = 0; i < sourceGroup.Items.Count; i++)
    {
        //Copy the menu item
        EO.Web.MenuItem sourceItem = sourceGroup.Items[i];
        EO.Web.MenuItem item = new EO.Web.MenuItem();
        item.Text = sourceItem.Text;
        item.IsSeparator = sourceItem.IsSeparator;
        targetGroup.Items.Add(item);

        //Recursively copy child items
        InitChildMenu(sourceItem.SubMenu, item.SubMenu);
    }
}

//Create a full top menu from your site map
topMenu.DataBind();

//Initialize child menus based on the top menu
InitChildMenus(topMenu);

//Create a new menu
EO.Web.Menu childMenu = new EO.Web.Menu();

//Create a new Panel to host the menu, this is the equivalent of the DIV
//element in the sample
Panel panel = new Panel();

//Add both into the page
childMenuPanel.Controls.Add(panel);
panel.Controls.Add(childMenu);

//Store the panel's ClientID into the parent item's (this is the top
//level item)'s Value property. This property is being used by the
//client side JavaScript to show/hide the menu
subMenu.ParentItem.Value = panel.ClientID;

if (g_curSelectedItem)
{
   ....
}
else
{
    //The original code hides "divConsumer", since we no longer
    //use hardcoded div ID, we will need to get the ID from the
    //first top level item's value property
    var topMenu = eo_GetObject("topMenu");
    var topGroup = topMenu.getTopGroup();
    var firstTopMenuItem = topGroup.getItemByIndex(0);
    var divId = firstTopMenuItem.getValue();

    //Hide it
    document.getElementById(divId).style.display = "none";
}