How can I update form field on Microsoft CRM Online via Javascript

Question

I\'ve just created a custom order form on the Microsoft Dynamics CRM Online.

Basically, I\'d like to update Total Amount field as multiply of Quantity and Amount Field.

Answer 1

1. The code needs tobe encapsulated as a JS function and then needs to be created as a Web Resource
2. The web resource needs to be associated with your form
3. You can then assign a function name to the appropriate event handler within your form.

Useful walkthrough: http://ayazahmad.wordpress.com/2011/05/25/javascript-libraries-in-microsoft-dynamics-crm-2011/

Answer 2

Here is info on how to setup the javascript for your forms: microsoft's form programming reference

the code for your calculation will look something like this:

var amount = Xrm.Page.getAttribute("youramountfieldname").getValue();
var quantity = Xrm.Page.getAttribute("yourquantityfieldname").getValue();

var totalamount = amount * quantity;
Xrm.Page.getAttribute("yourtotalamountfieldname").setValue(totalamount);