Trackment protection code

Trackment protection code

I have signed up Trackment, added my website. The given code for my
website is like;
<script src="http://trackment.com/?p=**code**"></script>
In their description, I need to add on my page, just after body tag. The
problem is that my designer havent add the body tag in the page, since its
a flash website.
I have added their code after my html tag, it works fine, however I
suspect if its working 100% correctly.
My question is, is it must to add the javascript code in between body tags
or its just a suggestion ? Note: javascript and jquery are included in my
web page.