object.style.appearance = "value";
<'appearance'> = none | auto | <compat-auto> | <compat-special>
none
The element is rendered following the usual rules of CSS.
auto
Automatically specified by the user agent.
<compat-auto> = searchfield | textarea | push-button | slider-horizontal | checkbox | radio | square-button | menulist | listbox | meter | progress-bar | button
<compat-special> = textfield | menulist-button