textArea.setAttribute('placeholder',_('Write your spoiler\'s content here'));
spoiler_button.setAttribute("active","true");
spoiler_button.innerHTML='<a class="icon-eye-blocked" title="'+_('Cancel writing spoiler message')+'"></a>';// better get the element <a></a> and change the class?
spoiler_button.innerHTML='<a class="icon-eye" title="'+_('Click here to write a message as a spoiler')+'"></a>';// better get the element <a></a> and change the class?
spoiler_button.innerHTML='<a class="icon-eye" title="'+__('Click here to write a message as a spoiler')+'"></a>';// better get the element <a></a> and change the class?