How do You disable or enable a form element?

Answer

There are two ways to disable or enable form elements.

Set the 'disabled' attribute to true or false:

 // Disable #pcds
 $('#pcds').attr('disabled', true);
 // Enable #pcds
 $('#pcds').attr('disabled', false);

Add or remove the 'disabled' attribute:

 // Disable #pcds
 $("#pcds").attr('disabled', 'disabled');
 // Enable #x
 $("#pcds").removeAttr('disabled');