The only allowed values for the
method attribute of form (case insensitive):
post
form data sent as the request body
get (default)
form data is appended to the action URL with a
?
separator
dialog
When the form is inside a dialog, closes the
dialog and causes a submit event to
be fired on submission,
without submitting data or clearing the form
Note that PUT is
not
allowed in a html form (see here)