I want to show the latest ID of an object when a page load.

Do you mean onload DOM event? we currently do not use template tokens there, although it may be a good idea.

hm. thanks for answering. but what could be a good work around with it?

I have 2 objects. Lets just say that the first object is named Quote. Then I created a new child object of the Quote object named Quote Line with a 1 Quote to many Quote Line relationship.
On adding up a record, Quote should be first added. and then the Quote Line. And what I wanted to do is to show on the Quote Line page the ID (which is an autonumber) of the last Quote record added instead of using the lookup field to choose where should it be referenced (and I don't want the user to choose where it will be referenced. It should be on the latest Quote record he added). so that the user will know that the last Quote record he added is where the Quote Line records he will be adding is referenced to.

thanks. I hope you can solve my problem. :)

You should be able to do an rb api call to get the record ID with the highest value for that object

how?

'You should be able to do an rb api call to get the record ID with the highest value for that object'

- Unless I am wrong, this can be achieve using the selectQuery api where the query can have the condition you need.

-Thanks,

Manooj