Shoutbox

You could use the windows api
This is from now playing so credit to dt:

code:

---

function alert(wndHandle,title,message){
    Interop.Call("User32", "MessageBoxW", wndHandle, message, title, 0);
}

---

The params are:
wndHandle - the windows handle of the relivent window
title - the title of the messagebox
message - the message to display