Can a embedded Form be passed different values depending on the Webpage that it is accessed from?

Can a embedded Form be passed different values depending on the Webpage that it is accessed from?

For instance, I have a website that allows the customer to select their sales agent and proceed to a page with an embedded Zoho Creator Form. Is there a way to prefill the sales agent information on the load of the embedded form? I know I can use redirect URLs to the Creator App with parameters attached when the sales agent is selected, but that will cause a customer log-in process to Zoho that I'd like to avoid. Any help is greatly appreciated!