(function($) {
    $.fn.thumbs = function(){
        var thumbMouseEnter = function(e){
            var target = $(e.currentTarget);
            target
                  .find('span.zoom')
                        .css('backgroundPosition', '0 100%')
                        .end()
                  .find('img')
                        .css('borderColor', '#1f5e76');
        }

        var thumbMouseLeave = function(e){
            var target = $(e.currentTarget);
            target
                  .find('span.zoom')
                        .css('backgroundPosition', '0 0')
                        .end()
                  .find('img')
                        .css('borderColor', '#cfcfcf');
        }
        
        this.each(function(){
            var $this = $(this);
            $this.bind('mouseenter', thumbMouseEnter);
            $this.bind('mouseleave', thumbMouseLeave);
        });
    };
})(jQuery);