How do i set the proper width when fancybox opens an external blueprint styled page?

I'm styling a ruby-on-rails app and I've got a link to an external page which opens in fancybox.

The external page is styled with blueprint's 24 column width (950px wide). I've hidden the wide elements (display:none in css) from that page so that the elements I'm interested in are only 250px wide in fancybox.

But when it opens in fanc开发者_如何学编程ybox it somehow still seems to read the .span-24 attribute rather than opening at the smaller size.

I can't create another external page and must use the blueprint styled one. Any advice on how to force fancybox to open, centered, as a 250px wide box?

Edit:

Here is the code I'm currently using:

$(document).ready(function() {

    $("a#fancypants-1").fancybox({
        'autodimensions'    : true,
        'width'             : 250,
        'scrolling'         : 'no',
        'opacity'          : true,
        'overlayShow'       : true,
        'overlayColor'      : '#000',
        'overlayOpacity'    : 0.8,
        'transitionIn'      : 'elastic',
        'hideOnContentClick': false ,
        'transitionOut'     : 'none'
    });
});

try like this

$.fancybox({

                    'autoDimensions'  : true,
                'height': 'auto',
                            'width':250px; 
                'scrolling' : 'no',
                'transitionIn'    : 'none',
                'transitionOut'    : 'none',                    

            });