[Plugin: Contact Form 7] Multi-line textarea

Hello,
I have a small problem with this plugin..
I’ve an option onfocus on textarea, the php code I got here in forum.
If I want a multi-line default text of textarea, the tag

[textarea xxx]
first line
second line
third line
[/textarea]

doesn’t work, and if I do this:
[textarea xxx "first line\nsecond line\nthird line"]
the function onfocus will be disabled..

Any idea?

P.S.: Sorry for english ?? I’m from czech and I only read english ??