I have jquery-2.1.3.js library in the /opt/lampp/htdocs directory and to test it I included it in a html file
<
script elements can have a src attribute or content, but not both. If they have both, the content is ignored (the content is considered "script documentation," not code).
Use another script block for your jQuery script
<script src="jquery-2.1.3.js">
</script>
<script>
$("p").css("color","orange")
$("body").css("background","#00ff00")
</script>