title: regex with space and letters only?
body: <p>I made a regular expression that only accepts letters. I'm not really good in regex, thats why I don't know how to include spaces in my regex. </p>
  
  <p><strong>My HTML:</strong></p>
  
  <pre><code>&lt;input id="input" /&gt;
  </code></pre>
  
  <p><strong>My js / jQuery code:</strong></p>
  
  <pre><code>$('#input').on('keyup', function() {
        var RegExpression = /^[a-zA-Z]*$/; 
  
        if (RegExpression.test($('#input').val())) {
  
        } 
        else {
            $('#input').val("");
        }
  });​
  </code></pre>