1) Does ARIA come into play in new coding or is it just something to be aware of doing maintenance coding on older work?

2) not understanding the full scope of Jquery yet-it is a library but how do I know what's in it and how to call it?

3) Not fully conversant on the .parent() process. Does it simply consider where it is used the parent? Or does it search for ul v.s. li?

4) I don't understand the $ use. Does that simply tell the browser that it needs to access the html element with the following class?

5) With accesablity, how deep does the reader go and what information does it give the user? Tags, code? or just the facts that the html
      provides? Does it bother to describe background art or any other "eye catching" designs?