jQuery has a .load() method, which is a convenient helper for retrieving HTML and loading it into an element. The load() method can also be configured to return only a portion of the source HTML. The sought porting is identified with a CSS selector.
Code:
$("#loadHere").load("HtmlPage3.html #fooBar");
Is the whole file downloaded and the desired portion is selected on the client side? Or, does selection happen on the server side?

Any suggestion, insight or reference is really appreciated!

Best,
- Nick