How can I change mouse keymapping

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http://askubuntu.com – I have Razer DeathAdder(left handed edition) and A4Tech wireless mouse. My problem is I don't know how to change wireless mouse keymapping(swaping left/right click). Can somebody guide me how to do such thing? List of my devices: ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ Logitech Unifying Device. Wireless PID:4004 id=8 [slave pointer (2)] ⎜ ↳ Razer Razer DeathAdder id=11 [slave pointer (2)] ⎜ ↳ A4TECH USB Device (HowTos)