Get form field value using an offset

Question

I have a Form created using Perl that has a table with a row for each invoice in a large table. I display all the rows in a table and allow the user to edit some info for each record:
for ($item_cntr = 0; $cntr < $record_cnt; ++$item_cntr)
{ print qq(<tr>
<td><input type="text" name="c_freight_$item_cntr" value="$i_freight[$item_cntr]" onBlur="linetotal($item_cntr)" ></td>
<td><input type="text" name="c_miscamt_$item_cntr" value="$i_miscamt[$item_cntr]" ></td>
<td><input type="text" name="c_price_$item_cntr" value="$i_price[$item_cntr]" ></td>
</tr>);
I want to create a Function that is called when they change the Freight value and that causes the rows total Price (freight + miscamt = price) to be calculated again (without hitting a Submit button on the Form).
I created a Function:
function linetotal(whatline) {
     var fixed_freight = "document.editform.c_freight_" + whatline;
     var fixed_misc = "document.editform.c_miscamt_" + whatline;
var linetotal = parseFloat(fixed_freight.value) + parseFloat(fixed_misc.value);
document.editform.c_price_whatline.value = linetotal; } }
So, if the first row in the table is 0, then the Function is passed "0" and should get the value of the form fields:
'c_freight_0' and 'c_miscamt_0' and set 'c_price_0' to a new value in the form.
The fixed_freight is showing that the string it has is correct, but it does not get the value from the form. Any ideas?

Answer 1

DrClap wrote:
DrLaszloJamf wrote:
DrClap wrote:
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Don't forget the free hugs forum there, too!
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Oh yeah. Are you a JavaRanch regular, Dr.C? I was for a while, but not recently.