title: how to add class to all tables without class in JS or JQ?
body: <p>i need to add class in JS or JQ to all the tables without class in a site, some already as class so i need it to add the class only to the tables who doesn't have... please advice? 
  edit: i also need the class to be unique with number after the name of the class</p>
  
  <pre><code>$('table').each(function(i){
                  $(this).addClass('classname',i);
              });
  </code></pre>