How about this? Straight out of the CF manual:
<h3>IsCustomFunction Example</h3>
<cfscript>
function realUDF() {
return 1;
}
</cfscript>
<cfset X = 1>
<!--- Example that fails existence test --->
<cfif IsDefined("Foo") AND IsCustomFunction(Foo)>
Foo is a UDF.<br>
</cfif>
<!--- Example that passes existence test but fails IsCustomFunction --->
<cfif IsDefined("X") AND IsCustomFunction(X)>
X is a UDF.<br>
</cfif>
<!--- Example that passes both tests--->
<cfif IsDefined("realUDF") AND IsCustomFunction(realUDF)>
realUDF is a function.<br>
</cfif>
Jake Pilgrim
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