Hi Gare,

The transitions are performed with javascript.

This is a sample from a test page.

Code:
 <script type="text/javascript">var xr_nextpage="xaraimages.htm"; var xr_transition=0; var xr_transitiontime=500;var xr_prevpage=""; var xr_btransition=0; var xr_btransitiontime=0;</script>