How to do calculation with the values in 2 form lists?

[hypamw]

Hello,

I have 2 form list menus on a page, say list_1 and list_2. Each of the llist
meuns has items associted with values. When a item in list_1 or list_2 is
selected, I want to multiply the values of the selected items in list_1 and
list_2. I'm using DW MX 2004 on Mac OS 10.2.8 with Apache, Mysql and PHP. How
can I do it? Does DW has any built-in function to this? Or Javascript?

Thanks in advance.

Pw

[hypamw]

Hello,

I figured out how to get the index and value of the selected item on a list
menu and do the multiplication on the values. Now I want to update a textfield
with the calculation result. I think I don't need a recordset for the dynamic
update. Should I use textfield for this purpose? Or there is something else?

Thanks in advance.

Pw