Ran into a snag when implementing fancybox. 2 things you should check before implementing. Be sure to include the CSS file and be sure to use integers for exact dimensions of an iframe.
Setting the width and height on a iframe for percentages
$("#various3").fancybox({
'width' : '75%',
'height' : '75%',
'autoScale' : false,
'transitionIn' : 'none',
'transitionOut' : 'none',
'type' : 'iframe'
});
Setting the width and height on a iframe for exact dimensions
$("#various3").fancybox({
'width' : 600, //remove quotes and set as integer
'height' : 400, //remove quotes and set as integer
'autoScale' : false,
'transitionIn' : 'none',
'transitionOut' : 'none',
'type' : 'iframe'
});