@hnsaifi,
As I said above,
http://en.forums.wordpress.com/topic/changing-fonts-4?replies=28#post-827481
I'm sure you understand that some friendly greetings between friends is not unwelcome in these forums.
It shouldn't surprise you that your subsequent remarks, which are less than cordial (bluntly: rude), have been answered so directly.
Please be kind in these forums.
But also, don't post incorrect, incomplete, or ill-researched answers to questions. Doing so makes this forum less than useful for everyone.
Tess