Ext.MessageBox.prompt make like a password input?

[Nikolajtesla]

Are there any ways to do
Ext.MessageBox.prompt()
look like a password input?

Because I need the input string look like ●●●●●.

[madkris]

Does it have to be a message box? Why use a window instead?

[Nikolajtesla]

Of course I can use a window, but I'm just looking if there is any other solution. If there is not or they are too sophisticated, then I'll use window