Javascript errors - Summing columns using Javascript

Question

Hi
I have two regions on a page which are tabular forms that I have manually setup using APEX_ITEMS that I would like to use some JavaScript to pick up the values entered and sum that row up. I used Vikas example for tabular form calculation and it works perfectly for 1 region however if I have two regions it seems to give me the following error message in Firefox:
g_table.rows[rownum].cells[getCellPos(g_table, html_GetElement("COL05"), "column")] has no properties
Which I gather is because there are two columns on the page named COL05 and idea how I could get around this problem.
I've put an example here: http://apex.oracle.com/pls/otn/f?p=35414:4

Answer 1

Hello,
It could be a bit difficult to auto sums a row, as
usually rows include non-numeric columns. In any
case you can always use a computation column in your
select statement, or build a derived column in the
report attributes tab. The problem is to update these
columns in real-time, after a specific cell has been
changed, and for that you need JavaScript.I realised this thats why I wanted to pickup the column and Row and then I would be able to replace the value in the specified column ie. total column using javascript for each row.
I’m not sure I’m following you, but if you mean the
current (active) rownum per displayed report page,
you can use the #FIRST_ROW_FETCHED# and
#LAST_ROW_FETCHED# substitution strings, in the
footer of the report region.
If you meant something else, please elaborate a bit
more.Look at the revised demo app http://apex.oracle.com/pls/otn/f?p=35414:4 as you can see in this particular example each region returned 15 rows of data. I wondered if there was a way to pick up the last row returned so that I could use the same javascript function I use to calculate the rows I could update that specific column/total row. Example, in my demo app you will see a null row returned I would like to find this row then update the values.