Post Div Data

you can wait for someone else eventually to answer you, but if you could explain me a bit more what you want to do ?

<div id="container-i-need-data-from" data-id="1">
</div>

<form id="my-form">
//fields bla bla
</form>

so you want to take data-id attribute from the div, and submit it with the form ?

(edit) my answer was wrong in anycase.