How to design a html form to feed something like hirachical

in html

Every node have it's subnode [not required] can be have parent node.

i want to design a webform which can be used to feed something and after submission i update them using json.

after that 开发者_如何学Pythoni need that

without going anywhere he can feed his childnode and parent node.

how i can make a webform who can solve this issue for me

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For node, you can use html unit list :

<ul>
<li>Item 1</li>
<li>Item 2</li>
</ul>

To make it dynamic, try you own from: http://woork.blogspot.com/2007/10/ajax-add-new-element-into-list-using.html