On July 2nd and 9th, the following Labs are listed as "Optional":

• 4.4: Please, let this guy out - don't be heartless by ignoring him! Also, here is a link to a page showing image-mapping to add a hypertext link.
• 4.5: This, of course, is an unordered list.
1. Here is a "nested" ordered list, 
2. inside of an unordered list.
1. And yet another. I'm sure you are thoroughly impressed about all of this, 
2. just as I am!
3. Obviously, this could
4. go on 
3. almost
4. forever! 

• 4.6: Here is a link to a "Frames" version of the my "CIS-101" homepage.