ajax.js

$.nette.ext('page', {
	load: function() {
		for (var i in this.callbacks) {
			var callback = this.callbacks[i];
			callback();
		}
	}
}, {
	callbacks: [],
	register: function(callback) {
		this.callbacks.push(callback);
		callback();
	}
});

// Initialize AJAX
$.nette.init();

page.js

$.nette.ext('page').register(function() {
// this is called right now
// and after every ajax request
});