property presence wont work

[AEM_USER1]

is there any reason why the presence wont work?

form1.Page1.Sec1Fields.ddlTopic::change - (JavaScript, client)

var newSelection = xfa.event.newText;
  if(newSelection == "Other"){
    xfa.host.messageBox("visible");
    Page1.Sec1Fields.txtOtherTopic.presence = "visible"; 
  } else {
    xfa.host.messageBox("hidden");
    Page1.Sec1Fields.txtOtherTopic.presence = "hidden"; 
  }
}

i have that piece of code and i will get the message but the field will not hide. please help @workflowuser  

[AEM_USER1 · Accepted solution]

this has been solved, the form needed to be saved as Dynamic 

[workflowuser]

glad it is working for you