I’m putting together a calculator for a customer that is based on 3 user inputs that output a bunch of numbers. It needs to have multiplication, subtraction, division and addition all in one form as the output fields relate to eachother.
I’m looking to get it setup to populate in real time as the user submits information.
Does anyone have any scripts/ideas where to begin – I’ve obviously googled but it’s a jungle out there so some straight advice would be awesome.
Basically the same way as it was done by karl in his first fiddle, but just make a variable out of the initial total sum, so you can just reuse that variable whenever you want later, kind of like this: http://jsfiddle.net/UmVs2/4/
Many thanks for putting that together – your help is very much appreciated guys!
I’ve got the form working based on all your advice and the only thing I need to do now is get rid of “NaN” that shows up during the inputting, once all the fields are filled it disappears but is there a way to hide it during input for the user?
You are my new angel. I can’t say thanks enough for all your help on this one. It’s finished now which is awesome – though I’ve tried using .toFixed(2) to round to decimal places but it stops working if I use that – any tips?
Thanks to all involved in this thread, this is just what I’m after but I need to ask the following:
How do I assign a custom value to each input title/section/field?
I need to calculate the total (add together, as in the example code), but each input item will have a different value, not 1 – i.e some will be 1, others will be 2.5 or 3, dependent on field/question being answered in the form.
So how can I add this predetermined custom value to the existing code, so that it will tally up the total answered fields at the end?