I have face the same problem and after times of trial and error, I found out that you can avoid scrollbars by overriding frame css class.
You can do like this:
iframe.fancybox-iframe {
overflow:hidden;
}
JS configuration:
jQuery(document).ready(function(){
$("a.various").fancybox({
'width' : 'auto',
'height' : 'auto',
'autoScale' : false,
'autoDimensions' : false,
'scrolling' : 'no',
'transitionIn' : 'none',
'transitionOut' : 'none',
'type' : 'iframe'
});
});
Note: Your fancybox box type must be an iframe
for this to take effect.