re-initialize

base.js

Base.initializers = {};

Base.init = function() {
	if (arguments.length == 1) {
		var to_init = arguments[0],
			scope = $(to_init).not('.initialized').addClass('initialized');
		$.each(Base.initializers[to_init], function(i, f) { f.apply(scope); });
	} else {
		var collection = (arguments.length == 0) ? Base.initializers : arguments;
		$.each(collection, function(i, e) { if (typeof i === 'string') Base.init(i); else Base.init(e); });
	}
};

Base.register_initializer = function(scope, lambda) {
	if (!Base.initializers[scope]) Base.initializers[scope] = [];
	Base.initializers[scope].push(lambda);
};

$(document).ready(function() {
	Base.init();
});

some_file.js

Base.register_initializer('p', function() {
	Base.debug('running p click init', this);
	this.click(function() {
		alert('bar');
	});
});

Base.register_initializer('p', function() {
	Base.debug('running p hover init', this);
	this.hover(function() {
		Base.debug('hover');
	});
});


function some_ajax_callback(foo) {
	$("body").append($('<p></p>').html(foo));
	Base.init('p');
}