     var theme = $(ev.target).val();
        var themeCSSLoaded = false;

        $.each( document.styleSheets, function(idx, css) {
          var href = css.href;
          if (href.indexOf('bootcards')>-1) {
            if (href.indexOf(theme)>-1) {
              themeCSSLoaded = true;
              css.disabled = false;
            } else {
              css.disabled = true;
            }
          }
        });

        if (!themeCSSLoaded) {
          $("<link/>", {
             rel: "stylesheet",
    