form
<input type="text" class="input-text required-entry validate-number form-control validate-zero-or-greater" id= "checkout-cart-credit-amount-textboxone" title="<?php echo $this->__('Gift Card Credit') ?>" name="customer_creditone" />
controller
public function getTextValueAction ()
{
$input_amount = $this->getRequest()->getParam('customer_creditone');
//echo $input_amount.'<br>';
$this->_redirect('checkout/cart');
}
controller is working fine me. how to call controller variable to phtml file