Selector not working as aspected

[p3pp8]

Hello, i need to get from html what is in the head and what is in the body but if i have a script or a style defined inside a body element it is returned has part of the head element and this is causing crashes to my web application.

es:

<script>console.log("script")</script>

!Text!

script elements is returned with selector $('head') but it doesn't belong to it!!!

Any help really appreciated!