Hello monks!

I am trying to connect to my database while the user is filling out the form. It works as such: the user fills out a text box, without submitting the form, I would like to have a pop up window from where the user can have more options that are coming from a database.
Here is my code:
IN HTML I HAVE:

<input type="text" name="textBox" size="8"> 
<a href="javascript:priceList('form.textBox.value');">Price List</a>
[download]

IN JAVASCRIPT I HAVE:

function priceList(text){
win=window.open("cgibin/getPrice.pl?textBox="+text,"","width=250,heigh
+t=240")
win.creator=self
}
[download]

IN PERL I HAVE:

use CGI;
$q = new CGI;

$partNumber = $q->param('textBox');
print ($partNumber);
[download]

Thus, as you can see in Perl I am printin the result of what i have got. The result on page that I get is UNDEFINED.
What am I doing wrong?
Thanks Monks I am out of guesses!