we can fire custom events in jquery and set an event handler for each event .
This enables loose coupling and code reuse . This can be used to achieve the observer design pattern .
$(’#txtAddress’).keyup(function() {
$(document).trigger(’ADDRESS_CHANGE’);
});
$(’#txtCity’).keyup(function() {
$(document).trigger(’CITY_CHANGE’);
});
to now bind the event :
$(document).bind(’ADDRESS_CHANGE’, function(e) {
UpdateName();
UpdateOtherText(e);
});
Hack Away 
