Web App Not Working Properly When Uploaded To Server

I've been working on a college project to rebuild a php/mysql web application. My local dev. environment runs php/mysql on IIS, and the server that hosts the web-app runs php/mysql on Apache. As part of the revamp I've coded a few bits of javascript that works perfectly in my dev machine, but when upload do not work properly. Here is the latest bit:

Form with hidden fields I want to post to the next page.
<form action="ADToDoPrintPage.php" target="_blank" method="post" id="fm">
<input type="hidden" name="TotalHours" id="TtlHour" value="<?php echo
"$total_hours" ?>"><input type="hidden"
name="TotalCycles" id="TtlCycle" value="
<?php echo "$total_cycles"; ?>">

Then a list of links, one of which posts the form to the desired page:
<li><a href="" onclick="document.getElementById('fm').
submit();return false;">
Printer Friendly View</a></li>

Problem is rather than going to the desired page, it simply directs to the homepage. I'm baffled as to why this is happening and dont know where to start looking. Could it be something do to with javascipt not being enable or permitted on the webserver? I've made sure the site is in the 'trusted sites' list in IE but with no joy.