Display form fileds on radio button select using #states

$form['membership_type'] = array(

'#type' => 'select', 

'#title' => t('Select Membership type'), 

'#default_value' => $node->selectbox, 

'#options' => $membership_type, 

'#description' => t('Choose an option'),

'#required' => TRUE,

  );

 $form['conditions1'] = array(

    '#type' => 'radios',

    '#title' => t('Select Attribute'),

 '#options' => array(0 => 'Rooms', 1 => 'Others'),

  );

  

  $form['using_free_nights_discount_forguest'] = array(  '#type' => 'textfield',

'#type' => 'textfield',

'#title' => t('Discount For Guest When Using Free Nights'), 

'#default_value' => $using_free_nights_discount_forguest,

'#states' => array(

'visible' => array(

  ':input[name="conditions1"]' => array('value' => t('0')),

),

'invisible' => array(

  array('value' => t('1')),

),

), 

'#size' => 29,

);

$form['notusing_free_nights_discount_forguest'] = array(  '#type' => 'textfield',

'#type' => 'textfield',

'#title' => t('Discount For Guest When Not Using Free Nights'), 

'#default_value' => $notusing_free_nights_discount_forguest, 

'#states' => array(

'visible' => array(

  ':input[name="conditions1"]' => array('value' => t('0')),

),

'invisible' => array(

  array('value' => t('1')),

),

),

'#size' => 29,

);

$form['notusing_free_nights_discount_formembers'] = array(  '#type' => 'textfield',

'#type' => 'textfield',

'#title' => t('Discount For Members When Not Using Free Nights'), 

'#default_value' => $notusing_free_nights_discount_formembers, 

'#states' => array(

'visible' => array(

  ':input[name="conditions1"]' => array('value' => t('0')),

),

'invisible' => array(

  array('value' => t('1')),

),

),

'#size' => 29,

);

$form['room_attribute_id'] = array(  '#type' => 'textfield',

'#type' => 'hidden',

'#title' => t('Room Attribute Id'), 

'#default_value' => 6, 

'#states' => array(

'visible' => array(

  ':input[name="conditions1"]' => array('value' => t('0')),

),

'invisible' => array(

  array('value' => t('1')),

),

),

'#size' => 29,

);

  

  $form['room_attributes'] = array(

'#type' => 'select', 

'#title' => t('Select Room Atributes'), 

'#default_value' => $node->selectbox, 

'#options' => $room_attributes,

'#description' => t('Choose an option'),

'#states' => array(

'visible' => array(

 ':input[name="conditions1"]' => array('value' => t('1')),

),

'invisible' => array(

  array('value' => t('0')),

),

    ),

  );

 

 $form['discount'] = array(

'#type' => 'textfield',

'#title' => t('Discount Rate'), 

'#size' => 29,

'#states' => array(

'visible' => array(

  ':input[name="conditions1"]' => array('value' => t('1')),

),

'invisible' => array(

  array('value' => t('0')),

),

),

);

$form['submit'] = array(

'#name' => 'submit',

'#type' => 'submit',

'#value' => t('Submit'),

);

return $form;