NewForm.aspx JQuery get ID newly created item

I want to retreive the ID of the newly inserted item with JQuery in the NewForm.aspx:

<script src="//code.jquery.com/jquery-1.10.1.min.js"></script><script type="text/javascript">
$(document).ready(function() {
    $('input[value=Save]').click(function() {
        alert('a');
    })
});</script>

I want to be sure, also in case of concurrency: is it possibile?

Thanx in advance,
Elena