title: Object doesn't support property or method 'attachEvent' InternetExplorer 11
body: <p>If I press the form send button "Saada" in <em>IE11</em>, I will get an error:</p>
  
  <pre><code>Object doesn't support property or method 'attachEvent'
  </code></pre>
  
  <p>I have found that this is an <em>IE11</em> problem, but the only solution I have found is to use my developer tools and set the browser to run in <em>IE9</em> mode for example.</p>
  
  <p>But I want everyone to use my website without using their developer tools.<br>
  Do you know some other solution I could try. Or maybe I have to import some other <em>Jquery</em> libraries?</p>
  
  <p>Other browsers work fine, but this only happens in IE11</p>