JS: Ajax pattern

gistfile1.js

var ajaxPattern = (function($){
	return {
		requestAjax: function(params){
			var settings = $.extend({
				url				: '',
				spinner				: undefined,
				form 				: '',
				dataType			: 'json',
				cache				: false,
				type				: 'POST',
				data				: '',
				error				:  function(){},
				success				:  function(){}
			}, params);

			$.ajax({
				url		: settings.url,
				dataType	: settings.dataType,
				success		: settings.success,
				data		: settings.data,
				type		: settings.type,
				cache		: settings.cache,
				beforeSend: function(){
					$(settings.spinner).fadeIn('slow');		
					disableForm(settings,true);
 				},
				complete:   function(response){			
					$(settings.spinner).fadeOut('slow');
					disableForm(settings,false);
				},
				error: function( xhr, tStatus, err ) {
				       if( xhr.status === 401 || xhr.status === 403 ) {
					  //redirect action here
					} else if ( xhr.status === 504 && !retries++ ) {
					  //make our recursive request
					  ajaxRequest();
					} else {
					  $(document).trigger( "ui-flash-message",
						[{ message: settings.errorMsg }] );
					}
			       } // end error handler


			});
		}
	};
})(jQuery);

function disableForm(forms,before) {

	if 	(forms.form != '') {

		if (before) {
			$(forms.form).animate({opacity:'-=0.4'});
		} else {
			$(forms.form).animate({opacity:'+=0.6'});
		}

		$(forms.form + " input").removeAttr("disabled"); 
		$(forms.form + " textarea").removeAttr("disabled"); 
		$(forms.form + " select").removeAttr("disabled"); 
		$(forms.form + " button").removeAttr("disabled");
	} 

}