Link to a specific step in onepage checkout

Question

Is it possible to redirect the browser to nth step in the onepage checkout? If so, how would one go about doing it?

I\'m working on a payment module and have a sort

Answer 1

checkout/onepage.phtml:

In PHP

$step = Mage::app()->getRequest()->getParam('step');
$stepCodes = array('billing', 'shipping', 'shipping_method', 'payment', 'review');

if (($step) && (in_array($step,$stepCodes)) && ($this->getActiveStep() == 'billing')) {
    $checkout = Mage::getSingleton('checkout/type_onepage');
    $checkout->saveBilling(Mage::getSingleton('checkout/session')->getQuote()->getBillingAddress()->toArray(),false);
    $checkout->saveShipping(Mage::getSingleton('checkout/session')->getQuote()->getShippingAddress()->toArray(),false);
    $checkout->saveShippingMethod(Mage::getSingleton('checkout/session')->getQuote()->getShippingAddress()->getShippingMethod());
    $activestep = Mage::app()->getRequest()->getParam('step');
}
else 
if($this->getActiveStep()) {
    $activestep = $this->getActiveStep();
}

In javascript

accordion.openSection('opc-');