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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Your question came up with no heading, could you please describe your question, pardon me are you referring to Form Next Button, I can see the tags you enter.
To get it work, I suggest you to use iFrame method. Review the following screenshot and read our guide below on How you can use iFrame method to embed your form on web page.
Do let us know if it helps, we would be happy to assist you further.