Need sone help with iqery plugin - Please !

[Cheng]

Hi.
I'm using this plugin for a responsive fullscreen isotope portfolio gallery:

jQuery(document).ready(function () {
    (function ($) {


        var container = $('.gallery-isotope');


        function getNumbColumns() {
            var winWidth = $(window).width(),
                columnNumb = 1;


            if (winWidth > 1500) {
                columnNumb = 6;
            } else if (winWidth > 1200) {
                columnNumb = 5;
            } else if (winWidth > 900) {
                columnNumb = 4;
            } else if (winWidth > 600) {
                columnNumb = 3;
            } else if (winWidth > 300) {
                columnNumb = 2;
            }

            return columnNumb;
        }


        function setColumnWidth() {
            var winWidth = $(window).width(),
                columnNumb = getNumbColumns(),
                postWidth = Math.floor(winWidth / columnNumb);

        }

        $('#portfolio-filter #filter a').click(function () {
            var selector = $(this).attr('data-filter');

            $(this).parent().parent().find('a').removeClass('current');
            $(this).addClass('current');

            container.isotope({
                filter: selector
            });

            setTimeout(function () {
                reArrangeProjects();
            }, 300);


            return false;
        });

        function reArrangeProjects() {
            setColumnWidth();
            container.isotope('reLayout');
        }


        container.imagesLoaded(function () {
            setColumnWidth();


            container.isotope({
                itemSelector: '.box',
                layoutMode: 'masonry',
                resizable: false
            });
        });




        $(window).on('debouncedresize', function () {
            reArrangeProjects();

        });


    })(jQuery);
});

The problem is that if I use the following at the beginning of the script:

var container = $('.gallery-isotope');

Filtering works, but it won't go fullscreen.

If I use:

var $container = $('.gallery-isotope');

It goes fullscreen, but the filtering doesn't work any more.
Hopefully someone here can point out what the problem is.
Thanks in advance for any help

[Deadweight]

Do you have a live code example?

[Cheng]

....... no I don't, but while I was creating a stripped down version for a jsfiddle for you to have a look at, I found the error.
To make a long story short, there was a conflict in one of the css files.
There was an entry with: [ margin: 0; ]
That was causing the conflict, but it's fixed now.
Anyway, thanks for your reply .......