JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You can login to your jotform account/username d2advertising using this link http://www.jotform.com/login
But being logged in to your jotform account on the Form Builder has no relevance to your customers knowing if you are online or not...
There must be a misunderstanding on the concept. Please review also this getting started article
How-to-Create-Your-First-Web-Form to have a better understanding on how the form works.
Hope this help. Let us know how we can be of further assistance.