How to do JavaScript object introspection?

Question

What to do when after all probing, a reportedly valid object return \'undefined\' for any attribute probed? I use jQuery, $(\'selector\').mouseover(function() { });

Answer 1

Is selector the name of the element? If so then you should reference it as:

$('area#selector')

or

$('#selector')

otherwise it will attempt to look for the (non-existent) "selector" HTML tag and, obviously, not find it.