set input element type to hidden
set input element type to hidden

This is necessary to preserve newlines in parameter values.
do not use `textarea` because `textarea.value` may not be
globally supported, `textarea.innerHTML` will interpret HTML
in values and `textarea.innerText` will squash newlines and
whitespace.

lognormal/boomerang,sdgdsffdsfff/boomerang,sdgdsffdsfff/boomerang,FredXue/boomerang,levexis/boomerang,lognormal/boomerang,levexis/boomerang,FredXue/boomerang