function spoiler_js(obj) {
var obj_content = obj.parentNode.parentNode.getElementsByTagName('div')[1];
var obj_text_show = obj.getElementsByTagName('span')[1];
var obj_text_hide = obj.getElementsByTagName('span')[0];

if (obj_content.style.display != '') {
  obj_content.style.display = '';
  obj_text_show.style.display = '';
  obj_text_hide.style.display = 'none';
} else {
  obj_content.style.display = 'none';
  obj_text_show.style.display = 'none';
  obj_text_hide.style.display = '';
}
return false;
}