[jQuery] Need help cuz I don't get 'this'

[Logictrap]

I need to get the src attribute of an img element that is a sub-
element of 'this' but I can't figure out how to traverse 'this' to get
there.

The contents of 'this' are:

     <div id="test1"><img src="images/beach1.jpg" width="200"
height="200" alt="beach" /></div>

this works:

     $('#output').html("ID: " + this.id);

This does not:

     $('#output').html("SRC: " + this.img.src);

How do I get the contents of the img.src attribute'?