How should I do to lock the browser screen?

[apaa]

If some body is not authenticated,I will show the login window,and I want to lock the browser screen besides the login window,How should I do ?

[jsakalos]

I'm not quite sure what you mean by "lock". There are 2 options: 1) display login window modal (user cannot click but still can use keyboard to tab through controls) or 2) Ext.getBody().hide().

[apaa]

like the Ext.msg.alert...,I have used the first option,thx!!!