Plasma has a refresh rate of 60Hz but the pixel is pulsed 12
times per hertz resulting in the equivalent of a 720 Hz.For more
fallow this link
http://www.digitalhome.ca/forum/showthread.php?t=73892
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you cant in the main part when you are looking at your profile, but
you can refresh pictures by clicking on them and you can refresh
your newsfeed
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The easiest way to make auto refresh on a webpage is using of meta refresh: