The question isn't really clear. Do you want us to explain what they are? or how they work? or how to avoid them?
Pro psaní komentáře se přihlaste.
The question isn't really clear. Do you want us to explain what they are? or how they work? or how to avoid them?
Pro psaní komentáře se přihlaste.
The question is on the title of this topic .. can somebody explain?