Yes. Here is the prototype for the open method:\n\nopen("method", "URL"[, asyncFlag[, "userName"[, "password"]]])\n\nSet "method" to "POST".\n\nNote: you cannot use any other HTTP verbs (such as HEAD) besides GET and POST. This is a current Apple limitation, and is a known issue.
Can Apple Safari's implementation of AJAX do POST actions as well as GET actions?