Attach event before and after class change with jquery

gistfile1.js

(function(){
	// Your base, I'm in it!
	var originalAddClassMethod = jQuery.fn.addClass;

	jQuery.fn.addClass = function(){
		
		jQuery(this).trigger('beforeCssClassChanged');
		var result = originalAddClassMethod.apply( this, arguments );
		jQuery(this).trigger('afterCssClassChanged');

		// return the original result
		return result;
	}
})();