jQuery.post duckpunched for error callback

gistfile1.js

jQuery.post = function( url, data, callback, type, onError ) {
	// shift arguments if data argument was omited
	if ( jQuery.isFunction( data ) ) {
		onError = type;
		type = callback;
		callback = data;
		data = {};
	}

	return jQuery.ajax({
		type: "POST",
		url: url,
		data: data,
		success: callback,
		error: onError,
		dataType: type
	});
}