Ray's work on iframe popup resizing.

caller.js

try {
    parent.FF.popup.resize(document);
} catch(e) {}

iframresize.js

FF.popup = {

    resize: function(d,w,h,options) {

        options 		= options ? options : {};
        options.inner	= options.inner==undefined ? true : options.inner;
        options.height	= options.height==undefined ? true : options.height;
        options.width	= options.width==undefined ? false : options.width;
        options.force	= options.force==undefined ? false : options.force;

        b 			= $(d).find("body");

        w 			= w ? w : b.width();
        h 			= h ? h : b.outerHeight(true);
        r 			= bheight<b.outerHeight(true);

        _cb = $.fn["colorbox"];

        if((_cb.options.scrolling==false && r) || options.force) {

            if(h>wheight) {
                b.css("overflow-y","auto");
                biframe.attr("scrolling","yes");
                options.scrolling = false;
                options.height = wheight;
            } else {

                if(options.inner) {
                    if(options.height)
                        options.innerHeight = options.innerHeight ? options.innerHeight : h;

                    if(options.width)
                        options.innerWidth = options.innerWidth ? options.innerWidth : w;

                } else {
                    if(options.height)
                        options.height = options.height ? options.height : h;

                    if(options.width)
                        options.width = options.width ? options.width : w;
                }
            }

            _cb.resize(options);
        }
    },
}