haha no, i was very unclear apparently. the calculations aren't done client-side; the formatting (regex) is though; the URL is static, i want it to to say  http://www.yahoo.com/cgi-bin/perl.cgi?
i just want the price to be reformatted from $1.99 to 1.99, for example. or from jkadhsjaa$.99 to .99, if you see what i'm doing. (stripping all but numbers and dots from price variable) the transaction is already processed, all that the user could fool with is a secondary logging system (i mean, if they feel that they have the spare time to fool a survey system, more power to them.) i just want to get the variable that i've regexed to appear within a tag like:  <IMG SRC="http://www.google.com/perl.cgi?amount=newstr">
just that, and nothing more.
to be more concise, this is exactly what i want it to do:

<SCRIPT LANGUAGE="JavaScript">
var re = /([^\d\.]+)/g;
var str = "FINAL_SUBTOTAL";
var newstr = str.replace(re, "");
<IMG SRC="https://www.google.com/perl.cgi?amount=newstr">
</script>
[download]

see what i'm trying to do? just making the "newstr" value be automated; i just can't figure out how javascript returns (actually, writes) a variable to a page.
in perl, i'd be doing this:

my $str = $other_scripts_input;
my $newstr;
$newstr =~ s/([^\d\.]+)/g;
print "<img src=\"http://www.someurl.com/perl.cgi?amount=$newstr\">";
[download]

but as i've said, i've not been given the time (at the moment) it takes to modify someone else's brainchild ):
i do appreciate all help given.

(you see, this is really a temporary workaround until i'm granted the time to modify their perl script and do it the right way)
strfry