What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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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.
I'm sorry, but I'm not familiarized with this type of forms.
Based on the description I found here: http://yourownmarketingsystem.com/how-to-create-a-floating-lead-capture-form-that-sits-on-top-of-any-website/ it seems to be very similar to a lightbox form which can be done in our system.
Here you can see how to do it: http://www.jotform.com/help/220-How-to-Create-a-Lightbox-Form and you can check here: http://apps.jotform.com/category/integrations the available integrations we have for you to capture leads in case you're interested in using this option.
I hope this information is useful to you.
Let us know if you have further questions.