Manually calling __doPostBack('myUpdatePanelId','mycustomeventarg')

In my Javascript I am manually calling

__doPostBack('myUpdatePanelId','mycustomeventarg')

It works fine except the Even开发者_开发技巧tArgs in my

protected void Page_Load(object sender, EventArgs e)

is always empty. Do I have to cast it to something else somehow?

I think that is normal. In my current project on every page call (whether or not postback)...

e == EventArgs.Empty