Do you see boxes and or strange circles in the Hebrew text? This web site uses Hebrew vowels and accents. In order for you to view them properly, you need a unicode Hebrew font with the vowels and accents. I highly recommend the Ezra SIL font, but you may also use the SBL Hebrew font.
Download one, install it, then come back.
Greek
For nice looking Greek text, download and install the Gentium font:
