.insertAfter or .append to an Element Id with Javascript. it's a script tag so it can't be with $

I want to add a script after a div, this is what I have:

<div id="uno">insert after this</div><br />
<开发者_如何学运维;p>this is a paragraph</p><br />
<div>this is a div</div>

var myscript = document.createElement('script');
myscript.setAttribute('src', 'Scripts/start.debug.js');
document.body.appendChild(myscript);

and this code will ad <script src="Scripts/start.debug.js"></script> at the end of the page, and i need it after div #uno. What can I use instead of document.body.appendChild?

<script>
// This function inserts newNode after referenceNode
function insertAfter( referenceNode, newNode )
{
    referenceNode.parentNode.insertBefore( newNode, referenceNode.nextSibling );
}
insertAfter(document.getElementById("uno"), newScript);
</script>

Even if a nextSibling doesn't exist in the DOM it will still work "because when the second parameter of insertBefore is null then the newNode is appended to the end of the parentNode". A great description can be found here: http://www.netlobo.com/javascript-insertafter.html.