+JS
+JsField
(gui '(+JS +Button) "@img/mapicon.gif" "@img/no.png"
'(set> (: home map) (path> (: home obj) 40)) )
...
(<p> '((id . map) (style . "width: 600px; height: 400px"))
(gui 'map '(+JsField) "showMap") )
See also +gui.