Possible usage:

$obj.focus(

function() {}, for focus event

function() {} for blur event

);

Something like:

(function($) {

var _focus = $.fn.focus;

$.fn.focus = function(focus, blur) {

_focus.call(this, focus);

if (blur) {

this.blur(blur);

}

};

}(jQuery));

not tested

This is really like the .hover(callback, callback) thing :)