Create unique tumblr ID based on permalink slug

slugify.js

    function slugify() {

        function removeBaseURL(url) {
            return url.substring(url.lastIndexOf('/') + 1);
        }

        function convertToSlug(text) {
            return text.toLowerCase()
                .replace(/ /g, '-')
                .replace(/[^\w-]+/g, '');
        }

        $('article').each(function(i) {
            var t = $(this).data('slug');
            t = removeBaseURL(t);
            t = convertToSlug(t);
            $(this).attr("id", t);
        });
    }