I'm in a small trouble. Ehm how can i call next page passing data with ajax?

Here's the code :

 $.ajax({ type: 'POST', url: "collaboratori.php", data: str_param, });

How can i call the page collaboratori.php passing str_param and go to collaboratori.php page? First ajax call and pass data to salvamod001.php page and then return a result. But in the second ajax call i want go to next page passing data and go there! Thanks very much Cris