How Do I change the font i see on the internet, for Mac OS X?

I donwloaded a Metallica style font for my Mac OS X iMac. I somehow changed the font my internet uses, and i cant seem to change it. Anyone know how to do it?How Do I change the font i see on the internet, for Mac OS X?
If you are using Safari, just select Safari-%26gt;Preferences. Select the Appearance tab and there you can change the standard font used to display websites