Sending Dynamic Data from Shopping Cart to an order confirm page on Concrete5

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Hi guys,

I'm totally new to this and need a little help with some coding. We own an ecommerce store and use Romancart for our shopping cart software. Romancart has a dynamic sales tracking script area in the control panel where we just drop in the tracking code/pixels, etc for any affiliate stuff and they all track fine. However we've just signed up to Kelkoo and they use tradedoubler tracking, and when we add their code into Romancart it doesn't track (something to do with the pixel sitting on the romancart server rather than our own, so it can't find the pixel). The only way to make it work is to have the tracking pixel sit on our own server (on our order confirm page), but it still needs to have some dynamic data passed through from romancart for it to work - these are <orderid> and <totalminusshipping>.

Can anyone explain what code i need to add to our own order confirm page (which is the very next page the customer visits after the romancart order confirm page) that will then pull through the dynamic data of <orderid> and <totalminusshipping> from romancart which in turn will make the pixel fire and track the sale?

Many thanks in advance for any advice...