title: How to do JavaScript object introspection?
body: <p>What to do when after all probing, a reportedly valid object return 'undefined' for any attribute probed? I use jQuery, <code>$('selector').mouseover(function() { });</code> Everything returns 'undefined' for <code>$(this)</code> inside the function scope. The selector is a 'area' for a map tag and I'm looking for its parent attributes.</p>