Detach all images if there is (In a lisp)

Hi, I've found this line that delete all images but it doesn't work well in a lisp if there's no image in the drawing.

(command "_.image" "_detach" "*")

I need someone to modify this line so that If there's images, delete them, else do nothing ?

Thanks !

Maybe ....

(if (ssget "_x" '((0 . "IMAGE")))
 (command "_.-image" "_detach" "*")
)

See this thread:

http://www.theswamp.org/index.php?topic=39468