title: how i set loading on save button extjs4?
body: <p>Hi i have save button and submit form, when i click show loading icon when form are not submitted. Please help me, in extjs 4.</p>
  
  <pre><code>buttons:[{ 
     text: save,
     handler: function(){ 
        form.submit({ 
            /sucess or failure code here; 
        }) 
     }
  }]
  </code></pre>