Can visitors interact with PHP echo functions?

I have four pages that use the same form, which is linked to the same
JavaScript file. Each page is also linked to a second JavaScript file,
which dictates whether the form will convert units of length, area,
weight or volume.

I don't know enough about JavaScript to even attempt to combine all four
JavaScript files, but there must be a way to create a single page that
performs all four functions.

To get the ball rolling, I changed the link to the second JavaScript
file to this:

<script language="JavaScript" src="<?php echo $seg ?>a1/js/cv<?php echo
$unit ?>.js"></script>

If I want the form to spit out lengths, then I change the head section
in the target page to this:

<?php
$seg = '../../../';
$unit = 'length';
?>

If I want to focus on weight, I change it to this:

<?php
$seg = '../../../';
$unit = 'weight';
?>

The next step is to create some sort of function that visitors can use
to toggle between style sheets. Basically, they would change $unit =
'weight'; to $unit = 'length';, $unit = 'area';, etc.

Can that be done?

I already have a style sheet select function that looks like this:

<a href="#" onclick="setActiveStyleSheet('Spring'); return false;"
title="Spring">Spring</a>

But I can't figure out how to adapt it to an echo function - $unit = 'area';

Does anyone have a solution? Either a PHP or JavaScript solution would
be fine - whatever works!

http://www.alistapart.com/articles/phpswitch/

craig v wrote:

http://www.alistapart.com/articles/phpswitch/


Thanks. I've seen that site, but I'm not sure if a style sheet switcher

can be adapted to an echo function - or how to do it.