Setting an expression variable

Question

Hi, I've created a small piece of Flash for a client which
will work as an ad on external sites, with a clickthough link.
I've been asked to follow some simple instructions to create
the link. My Actionscript skills are pretty minimal, though. I need
to send it along to another agency, so don't have the luxury of
being able to test if it works in situ - I'd appreciate some help.
The instructions I've been given are:
"1. Select your button instance in the flash movie
2. Add mouse event On(release)
3. add get url command Get URL( )
4. Set URL to clickTAG (make sure this URL is an expression
variable)
5. Set window target to _blank
Typical action code
On (release)
Get URL (clickTAG, window="_blank")
End On
It is essential that the clickTAG variable is set to be an
expression"
Now, I've created a big 'invisible button' over the animation
with:
on(release) {
getURL(clickTAG,"_blank");
Is that correct? Also, please let me know how I set the
variable to be an expression, and where that code should go.
Many thanks in advance, Reg

Answer 1

that looks like what they are saying but that only makes
sense if clickTAG is defined elsewhere in your code.