Without knowing the larger picture of your web application, here are a few places/ways to determine the current page:
If you are using Application.cfc, the current page is passed as a parameter to the onRequestStart method. The parameter is called 'targetPage' by default (though I imagine you could change that) and it contains the path, from the web root, to the page that's being called. If the page being called is www.mydomain.com/index.cfm, this parameter's value would be 'index.cfm'.
Example:
<cffunction name="onRequestStart">
<cfargument name="targetPage" />
<cfif targetPage is "index.cfm">
<!--- do something here based on page being requested --->
</cfif>
</cffunction>
You can also use CGI variables on any CML page in your application to get the page name. Of the many variables in the CGI scope, script_name is probably the best one to use.
Example:
<cfif cgi.script_name is "index.cfm">
<!--- do something here based on page being requested --->
</cfif>
Hopefully, the above will get you started. Good luck and have fun!