title: Changing TextField style dynamically in Extjs
body: <p>I'm trying to set the background-color and color of a TextField (to mask a password) on a checkbox click event. My best try:</p>
  
  <pre><code>var hidePass = new Ext.form.Checkbox({
              xtype: 'checkbox',
              boxLabel: 'Hide Password',
              name: 'hidePass',
              handler: function (checkbox, checked) {
                  if (checked) {
                      pass1.fieldStyle = 'background-color: #ddd; background-image: none;';
                  }
              }
          });
  </code></pre>
  
  <p>this code doesn't work. No errors are thrown. I'm not sure where to go from here. I've searched everywhere and can't find anything like this. I can't find any properties or methods to change the style that works.</p>