it should look something like this:

url.resolveScript({ scriptId: 'customscript_scriptid', deploymentId: 'customdeploy_deployid', params: { id: 12345 } });

uh, i didn't notice at first, but this doesn't do what I am looking for either. For this to work, I need the id in the Suitelet script, but the id is being appended to the URL via a Scheduled Script that sends the email to vendors. I am thinking that the way I am doing this I'll have to add a client script to the Suitelet Script to access the window? Or, just totally change my approach. Thanks

The params object translates the key-value pairs into

&key=value

, so this should have the same effect as appending

&id=12345

to the Suitelet URL. It should achieve the same result. What url are you trying to append

&id=12345

to? the Suitelet, or something else?

yes, to the Suitelet. So the email is going to vendors who are supposed to be able to access the Suitelet without being logged-in. So I generate the list of POs and their sublist data for the email body. From the email, they can click on a link that takes them to the Suitelet, so I append the

&id=12345

to the Suitlet URL in the Scheduled Script that sends the email

Sure!

context.request.parameters

is indeed useful in a suitelet, allowing you to read in any of the query parameters, even ones added outside of netsuite, which can be very handy