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ADDTOHEAD -- add HTML to the HTML head section of the current page

• Useful for TWiki applications to add custom CSS or JavaScript to the HTML head section of a topic. Supplied TWiki variables will be expanded. %ADDTOHEAD{}% expands in-place to an empty string, unless there is an error in which case the variable expands to an error string.
• Syntax: %ADDTOHEAD{ "..." text="..." }%
• Supported parameters:

  Parameter:	Description:	Comment:
  "..."	ID of the head block, such as "MY_CSS"	Optional but recommended
  text="..."	HTML text to add to the head section	Mutually exclusive with topic=""
  topic="Web.TopicName"	Name of topic that contains the full HTML text to add to the head section, such as topic="Main.MyCssTopic"	Mutually exclusive with text=""
  requires="..., ..."	Comma-separated list of other IDs this one depends on	Optional

• Example: %ADDTOHEAD{ "MYBOX_CSS" text="<style type=\"text/css\"> .myBox { height: 22px; background-color: #AFB3C5; } </style>" }%

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