I had already developed the js code that allowed me to display the context menu through another action. For example, by left clicking or pressing a key.

I managed to do what I wanted for most elements except for some like the mails in gmail or hotmail. When you right-click, there is a small menu with "archive" or "mark as unread" for example. What I would like to do is force the display of the classic menu on these too.

Here is the code I have so far:
var displayingMenu = function(element, event)
    var Event = element.ownerDocument.createEvent('MouseEvents');

    Event.initMouseEvent('contextmenu', true, true, element.ownerDocument.defaultView, 1, event.screenX, event.screenY, event.clientX, event.clientY, false, false, false, false, 2, null);
With that, on an email in gmail for example I still have the special menu "archive" etc ...
Do you have any idea about how I could do to reach my goal?