title: Replacing alpha characters and spaces in string with jQuery
body: <p>I have a string that allows only numbers</p>
  
  <pre><code>$(this).val($(this).val().replace(/([a-zA-Z])/g, ""));
  </code></pre>
  
  <p>How can I add a space, so this will get replaced with "" same way in one string?</p>