[html] Specify a Root Path of your HTML directory for script links?

I recommend using the HTML <base> element:

<head>
    <base href="http://www.example.com/default/">
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
</head>

In this example, the stylesheet is located in http://www.example.com/default/style.css, the script in http://www.example.com/default/script.js. The advantage of <base> over / is that it is more flexible. Your whole website can be located in a subdirectory of a domain, and you can easily alter the default directory of your website.