javascript value for input field ignored by pricing calculation

Hi Everyone

I have some javascript on my gravity form which generates a value for 'kmdistance'
It inserts this value into a gravity form input field called input_1_19 using this code.

document.getElementById('input_1_19').value = kmdistance;

This works. However, I now want to add pricing calculation to my form, and a product field type 'calculation' with a simple multiplication field does not work automatically - not unless I manually enter something into the distance field.

{Distance:19} * 2

It seems that once the value is inserted into the form field via javascript, I need to tell gravity forms to re-check the calculation. Does anyone know how to do this ?

Regards Steven

Hi Chris

Sorry, I hadn't thought about including a link to the form because it is locally developed and not accessible to the net.

I don't believe this is a bug as I am using my own embedded functions to display a google map and calculate the distance between two points.

I understand gravity forms would 'watch' for changes made to input fields and update pricing accordingly, but only when the input field is updated manually.

Since the value is being passed transparently, I believe I that I need to invoke a function to get gravity forms to refresh without leaving from the page.

I can call this function in my own JavaScript if there was one that you could recommend..

If you still wanted to see the form, I can upload this somewhere, however it's a highly sensitive project do I would need to private message you the address.

Many thanks for your help

Regards Steven

Right on, glad you got it working.