There are times when I need to use a particular script or style
sheet temporarily and only on a portion of the site. This is
especially true with a blog.
For example, if you use SyntaxHighlighter, you could use up
to 21 brush scripts, plus the core script and theme style
sheet. That makes for a lot of references in the head
tag. That is why I almost always add the
following inside the <head> tag in my
top lever master page between the style sheet and script
references.