annotation.js — URIs identifying JavaScript files with support for annotation popups
<xsl:param name="annotation.js"> <xsl:text>http://docbook.sourceforge.net/release/script/AnchorPosition.js http://docbook.sourceforge.net/release/script/PopupWindow.js</xsl:text></xsl:param>
If annotation.support is enabled and the
document contains annotations, then the URIs listed
in this parameter will be included. These JavaScript files are required
for popup annotation support.