I need to identify elements from which events are fired.
Using event.target gets the respective element.
What properties can I use from there?<
event.target returns the DOM element, so you can retrieve any property/ attribute that has a value; so, to answer your question more specifically, you will always be able to retrieve nodeName, and you can retrieve href and id, provided the element has a href and id defined; otherwise undefined will be returned.
However, inside an event handler, you can use this, which is set to the DOM element as well; much easier.
$('foo').bind('click', function () {
// inside here, `this` will refer to the foo that was clicked
});