From http://www.w3schools.com (Copyright Refsnes Data)
To play a SMIL presentation, you will need a SMIL player. Different SMIL players can be found on the Internet. However, with Internet Explorer 5.5 or later, SMIL elements can be inserted into HTML files.
Note: The examples below will use Internet Explorer 5.5 or later to demonstrate the use of SMIL.
SMIL Timing
Specify how long an element should be visible
Specify when the element should be visible
SMIL Sequences
Displaying a sequence of images
Displaying a sequence of texts
SMIL in Parallel
Displaying things simultaneously
SMIL Transitions
SMIL Media
From http://www.w3schools.com (Copyright Refsnes Data)