Fire an event on any CRM field change

The following code shows how you can attach any function to all of the fields on a CRM form for execution when any of them change. It's based on Michael Höhne's code to find all fields on a form:

FieldChange = function () {
alert("Change!");
}

for (var index in crmForm.all) {
var control = crmForm.all[index];
if (control.req && (control.Disabled != null)) {
control.attachEvent("onchange", FieldChange);
}
}

(Posted by Dave Berry - http://crmentropy.blogspot.com/2009/12/fire-event-on-any-crm-field-change.html)