Just want to confirm something on the form.addButton function. The third parameter for the onclick JS script. What are the specific limitations to that?

Typically, I've used it for redirection to either another record or Suitelet via document.location or window.open. However, I want to run a function that performs some logic, updates a record, and then redirects.

I've tried the syntax (note this is for View mode only):

form.addButton('custpagemybutton', 'Button Name', 'functionName()')    function functionName()  {     Perform calculations     Update record(s)     Redirect to another page  }