How do I know if a file is there?

I am trying to check to see if a specific file in a directory is there before I allow the user to move on.

I'm looking for a way to basically say,
<cfif #file# exists>
<img src="#file#">
<cfelse>
You need to upload the file.
</cfif>

I looked at the CFFILE and CFDIRECTORY tags, and they don't seem to have a way to check like this.

I looked into the list feature of CFDirectory, but I thought there must be a better way than to retrieve the list of files, then look through the list to see if the file name is there.

Thanks for the help.

hopefully the following snippet helps you out:

<!--- Absolute path + filname to the expected file --->
<cfset myFile = "C:\bogus.txt">

<cfif FileExists(myFile)>
<cfoutput>#myFile#</cfoutput> EXISTS!!!
<cfelse>
<cfoutput>#myFile#</cfoutput> DOES NOT EXIST!!!
</cfif>

Wow,
Look at that! the FileExists function is right there on Page 206 of the Cold Fusion5 Language Refrence! How did I miss that!?!?

Thanks! I feel pretty stupid now. I use that book almost every day, and don't remember ever seeing that function.

THANKS!