title: jQuery form plugin with pass dynamic data
body: <p>I'm using jquery form plugin. and this is my sample form</p>
  
  <pre><code>&lt;form id='formId' action='&lt;?php echo $_SERVER['PHP_SELF']l?&gt;' method='POST'&gt;
  &lt;input type='text' name='username'/&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>And this my Javascript</p>
  
  <pre><code>$('#formId').ajaxForm({
      success:function(data){
         console.log(data)
      }
  })
  </code></pre>
  
  <p>In this case i want to pass another data value dynamically without implement it in HTML. For example i want to pass the password field. Is there any method to implement this option?</p>