Old opra

window.addEventListener("load", function ()
{
    //Tool bar button
    var btn;
    var btnProps =
    {
        title : "MENU ACTION CONTEXT",
        icon : "images/png/icon32.png",
        popup :
        {
            href : "addWindow.html",
            height : 420,
            width : 920
        }
    }
    btn = opera.contexts.toolbar.createItem(btnProps);
    opera.contexts.toolbar.addItem(btn);

    //Context menu item
    if (opera.contexts.menu)
    {
        var menu = opera.contexts.menu;
        var itemProps =
        {
            title : 'MENU ACTION CONTEXT',
            contexts: ['all'],
            icon: 'images/png/icon16.png',
            onclick : function (event)
            {
             /*
I'm need Open this:
    var btnProps =
    {
        title : "MENU ACTION CONTEXT",
        icon : "images/png/icon32.png",
        popup :
        {
            href : "addWindow.html",
            height : 420,
            width : 920
        }
    }

FROM HERE. How to do that?
                     */
            }
        }
        var item = menu.createItem(itemProps);
        menu.addItem(item);
    }
    else
    {
        console.error('Context Menu API not supported.');
    }
}, false);