jQuery Register general ajax or getJSON error handler

It's always quite handy to register something general for handling errors occuring in your script when using Ajax in jQuery:

Somewhere in your jQuey based Ajax handling scripts register a general error handler like so:

$.ajaxSetup({
  "error":function(XMLHttpRequest, textStatus, errorThrown) {
  	alert ('an error occured - please use Firebug console to view the details ')
  	if (window.console && window.console.log){
  		 console.log(textStatus);   
  		 console.log(errorThrown);   
  		 console.log(XMLHttpRequest.responseText);   
  		 console.log(XMLHttpRequest);   
  	}
}});