Piping a Javascript prompt to a scalar

[Kevin Creason]

I'm trying to pipe a javascript prompt into a scalar.
It goes like this:
the cgi prints the normal content-type yada yada yada
and then :
print "
<script>
prompt(\"User: \", \"\");
</script>
";
Which bring up a window before anything requesting input before a HTML
document would proceed.
How do I capture this into a scalar?  Is there are better way to get a
username before a CGi proceeds?

I tried $scalar=(print all that stuff);
and $scalar=<STDIN>;
and $scalar=$ARGV[0];

Any ideas?

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