Apart from your not using strict (which I and I should think everyone else round here would encourage you to do), I don't think there's a problem with your Perl. If you're outputting to a web browser you'll need

print
    $q->header,
    $partNumber;
[download]

but you probably knew this.

I think the problem is likely to be in your jscript, and two possibles are

• I think form.textBox.value should perhaps not be in quotes
• Do you need cgi-bin instead of cgibin?

§ George Sherston