Updateable report with javascript calculation

Hi all,
I have an updateable report where the user fills in one column. I then need a simple multiplication based on the user filled in column and another column to populate into the final column.
I have managed to do this using the following javascript in the page header
<script language="JavaScript" type="text/javascript">

</script>Column f01 is a value in a table based on the SQL to create the report (AQLSCORE)
Column f02 is what the user fills in (AQLERRORS)
Column f03 is where the calculation is populated (AQLTOTAL)
With AQLERRORS element attribute = onchange="calcit(this);"
The problem I am having with the above is that it only works when f03 is a text field (i.e. the user can change the value) I would like the column to be non-editable (the user should not be able to change this field). If I make the column Display as text (saves state) the calculation returns a NaN error.
When I change the calculation from a * to a + the value returned is 1undefined showing that the value from f01 is undefined
Demo app
http://apex.oracle.com/pls/apex/f?p=15328
username: demo
password: demo
There are 2 pages one where the calculation is working but with AQLSCORE as a text field and another where it is returning NaN but with AQLSCORE as Display as text (Saves state)
Any ideas how I can perform the calculation and protect the AQLSCORE column from the user
Kind regards,
Alex
Edited by: user10942729 on 30-Jul-2010 08:12

Thank you for your response.
I have corrected the code as you suggested however it still causes the same error.
I have very limited knowledge of java and html (probably not a good start I realise) but it seems that the javascript cannot see(??) the value in the AQLScore (f01) column when it is Display as Text(saves state)
If I change the calculation to just make the value = the AQLScore (f01) without the parseInt syntax 'undefined' is returned. With the parseInt 'NaN' is returned.
I will keep looking for an answer
Cheers,
Alex

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