Before and after callbacks are supported for each slide transition. Within the context of your callback method, this is the element that is transitioning in before and after callbacks are supported for each slide transition. The before option specifies the name of the callback function. To be invoked immediately before a slide transition. There are tons of options you can use to control how and when your slide transitions occur.

jquery.cycle plugin (malsup.com)
immagini runryder.com (IRCHA 2007 HELI JAMBOREE)