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$('.content-block__workarea').find('a').each(function(){
       var url_parts = $(this).attr('href').split('.');
       switch (url_parts[url_parts.length - 1]) {
           case 'doc': case 'docx':
           $(this).addClass('downloadable_file doc').parent('li').addClass('li-no-style');
           break;
           case 'xls':
               $(this).addClass('downloadable_file xls').parent('li').addClass('li-no-style');
               break;
           case 'pdf':
               $(this).addClass('downloadable_file pdf').parent('li').addClass('li-no-style');
               break;
       }
   });