In your layout files, which *.html files located in...
/templates/<your template>/
For example: /templates/Default/Articles.html
...you should make sure that the following files are included in each layout file, in between the <head></head> tags...
<link href="%%Config.CurrentTemplatePath%%/Styles/%%Config.StyleWidth%%.css" type="text/css" rel="stylesheet" />
<link href="%%Config.CurrentTemplatePath%%/Styles/%%Config.SiteColor%%.css" type="text/css" rel="stylesheet" />
<link href="%%Config.CurrentTemplatePath%%/Styles/styles.css" type="text/css" rel="stylesheet" />
<link href="%%Config.CurrentTemplatePath%%/Styles/HelpTip.css" type="text/css" rel="stylesheet">
<script type="text/javascript" src="%%GLOBAL_siteURL%%/javascript/menudrop.js"></script>
<script type="text/javascript" src="%%GLOBAL_siteURL%%/javascript/jquery.js"></script>
<script type="text/javascript" src="%%GLOBAL_siteURL%%/js.php?f=formUtil"></script>
<script type="text/javascript" src="%%GLOBAL_siteURL%%/javascript/helpTip.js"></script>
<!--[if IE]>
<style type="text/css" media="screen">
@import "%%Config.CurrentTemplatePath%%/Styles/styles-ie.css";
</style>
<![endif]-->The above code may change slightly from template to template, but this is the standard code included with the Default template and modifications are neither recommended, nor officially supported.

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