Binding data

I realy don’t know if I ask this the right way and if this is the right place but i give it a try. I’m making a site that has holiday houses for rent. The values from the result page (listing from available houses) are in an external database. A visitor has the posibility to contact the owner from the website about a particular house by clicking a text link “contact us about this house” Clicking the text link brings you to a enquiry form: enquiry.cfm. Every house has a reference number that is included in the text link. (example:

P.s. This is not a real link so it isn’t working!

What i would like to accomplisch is that the reference number appears in the form in enquiry.cfm. How can i make that happen

Thanks and regards in advance