$(this) selector and children?

Having a layout similar to this

<div id="..."><img src="..."></div>

The jQuery constructor accepts a 2nd parameter called context which can be used to override the context of the selection.

jQuery("img", this);
Which is the same as using .find() like this:

jQuery(this).find("img");
If the imgs you desire are only direct descendants of the clicked element, you can also use .children():

jQuery(this).children("img");


            OR
         
You could also use

jQuery(this).find('img');
which would return all imgs that are descendants of the div

If you need to get the first img that's down exactly one level, you can do

jQuery(this).children("img:first")