title: Campaign Monitor Ajax form submission
body: <p>Campaign Monitor seems to have updated their code snippets to use a different method of submitting the forms. Now in the <code>&lt;form&gt;</code> tag there's a <code>data-id</code> attribute. None of the usual ways of submitting the forms using Ajax work anymore. Does anybody know how to use Ajax to submit the new style of Campaign Monitor forms?</p>
  
  <p>Here's the code snippet Campaign Monitor gives me:</p>
  
  <pre><code>&lt;form id="subForm" class="js-cm-form" action="https://www.createsend.com/t/subscribeerror?description=" method="post" data-id="A61C50BDC994654B1D79D5719EC1255C09788D1CED7F46D508DAE8944C2CB34BA5EC78954EB81FB5F54AD0716B1F245E696D5CFAF72B819D19DC3B44517"&gt;    
  &lt;p&gt;
      &lt;label for="fieldEmail"&gt;Email&lt;/label&gt;
      &lt;br /&gt;
      &lt;input id="fieldEmail" name="cm-wmpt-wmpt" type="email" class="js-cm-email-input"
      required /&gt;
  &lt;/p&gt;
  &lt;p&gt;
      &lt;button class="js-cm-submit-button" type="submit"&gt;Subscribe&lt;/button&gt;
  &lt;/p&gt;
  &lt;/form&gt;
  &lt;script type="text/javascript" src="https://js.createsend1.com/javascript/copypastesubscribeformlogic.js"&gt;&lt;/script&gt;
  </code></pre>