Format JS var inside JS function with CF!

OK - I'll try and explain:
I want to use CF (MX6) to format a js variable while inside a js function:

e.g:
<cfoutput>
<script language="JavaScript" type="text/javascript">
function formatSomething() {
var something = "#DateFormat('02/04/06','dd MMM yyyy')#";
alert(something);
}
</script>
</cfoutput>

Now this is ok if I hardcode the value of 'something'. What if I want to pass 'something' in?

<cfoutput>
<script language="JavaScript" type="text/javascript">
function formatSomething(something) {
var somethingElse = "#DateFormat('"+something+"','dd MMM yyyy')#";
alert(somethingElse);
}
</script>
</cfoutput>

Of course this doesn't work! - Neither does:
var somethingElse = eval("#DateFormat('"+something+"','dd MMM yyyy')#");
var somethingElse = "#Evaluate(DateFormat('"+something+"','dd MMM yyyy'))#";
var somethingElse = eval("#Evaluate(DateFormat('"+something+"','dd MMM yyyy'))#");

It's not specifically dates either - I just want to know if it's possible to do this someway?
I'm currently looking at opening a child window off screen to do what I want and pass back to the JS function but it seems like an urrggggghhh way to do it..

Ta for any help...