How to get Order Increment ID in Magento

Here is the script to increment the order id in magento

$order = Mage::getModel('sales/order');
$order->load(Mage::getSingleton('sales/order')->getLastOrderId());
$lastOrderId = $order->getIncrementId();

Last real order id

Mage::getSingleton('checkout/session')->getLastRealOrderId();

Hope it helps.. Thanks...