如何在ColdFusion中基于引用重定向

I have a coldfusion web site I need to change. Have no idea or experience with this environment (I do know ASP.NET). All I need to do is to write a condition based on the referral value (the URL) of the page, and redirect to another page in some cases. Can anyone give me an example of the syntax that would perform this?I have a coldfusion web site I need to change.