On IE, click on the yellow bar and select "Allow Blocked Content". And then, select Tools --> Internet Options, click the Advanced tab, and check "Allow active content to run in files on my computer" under Security.
For Mozilla Firefox, click on Tools --> Options --> Content --> and check the enable JavaScript box.
Normalization Notes: normalization.ppt
SQL Notes: sql-dml.ppt
DBMS Notes: dbms.ppt
XML Notes (prelim.): xml.ppt