(cdr params))))
    (case dtype
      ((raw)     res)
      ((number)  (if (string? res)(string->number res) #f))
      ((escaped) (if (string? res)
		     (s:html-filter->string res tags)
		     res))
      ((escaped-nl) (if (string? res) ;; escape \n and \r
			(string-intersperse
			 (string-split
			  (string-intersperse
			   (string-split (s:html-filter->string res tags) "\n")
			   "\\n")
			  "\r")
			 "\\r")
			res))
      (else      (if (string? res)
		     (s:html-filter->string res '())
		     res)))))

(define (session:get-param self key type-params)
  ;; (session:log s:session "params=" (slot-ref s:session 'params))
  (let* ((params (sdat-get-params self))