Jquery event.data and is default prevented

Returns: Anything
event.data
The optional data passed to jQuery.fn.bind when the current executing handler was bound.
Example
The description of the example.
$("a").each(function(i) {
$(this).bind('click', {index:i}, function(e){
alert('my index is ' + e.data.index);
});
});event.isDefaultPrevented()
Returns: Boolean
.event.isDefaultPrevented()
Returns whether event.preventDefault() was ever called on this event object.
Example
Checks whether event.preventDefault() was called.
$("a").click(function(event){
alert( event.isDefaultPrevented() ); // false
event.preventDefault();
alert( event.isDefaultPrevented() ); // true
});