I am trying to calculate a price whilst a form is being entered.
The visitor will select 1 item from a drop-down list, then a Quantity in a numeric field.
As they amend their selection, I want a total price to be displayed on the form.
All this without using the Submit button.

I have seen many script samples but I just can’t get anything working.


I have even reduced my code to simply force a fixed value into the result field on change of my list box selection ...

This is the ‘custom’ ActionScript called on ‘Change’ of the ‘userList1’ field.

function ff_userList1_action(element, action)
{
switch (action)
{
case 'change':
ff_getElementByName('FinalPrice').Value = 'A';
break;
default:;
} // switch
} // ff_itemNum_action

I know the code is being called because I mis-typed ‘FinalPrice’ and FireBug picked up the error.

The FinalPrice is a ReadOnly field.
I have tried with and without the Library Initscript on Form Entry of FF::ff_showelementinit but it makes no difference. I found advice for setting this but I cant find that post anymore.

I am using the Quick Mode for form design. (Joomla 2.5)
I am new to Joomla and RSForm so it is possible I have missed something very obvious.
Any advice please?

I might be new to Joomla and forms ..... but not to forums
.... so you'd think I could post on the right forum

Sorry - this question is not for RSForms!