JavaScript can be placed in
<header>
or
<body>
, with different effect, and can be embedded in HTML or external. This is explained here:
http://www.w3schools.com/js/js_howto.asp[
^].
CSS is simpler, because it's not executed, but the style can be inlined in the element or be in a style sheet. A style sheet can also be embedded (normally, in
<header>
) or be external. Please see:
http://www.htmlhelp.com/reference/css/style-html.html[
^].
—SA