ACPI Power Management Prefences

[desperado]

Hi
I run a desktop PC with Linux Mint Maya 64 bit installed.
My question concerns Power Management Preferences: actually the computer goes to sleep when inactive for nn minutes. But in case of I listening to a streaming webradio I want to prevent my computer to go to sleep. Any idea how to configure the power management that it prevents from suspending while listening webradio?

Thank you in advance.

[remoulder]

You can't specify different power save settings for different websites if that's what you mean. The only way you could do this would be to use a media player that offered it's own option to prevent system sleeping.