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This plugin is completely free for use in any context or connection.
htmlbox2.swf
Use this hotspot plugin to generate a scrollable box with HTML content. The HTML links can of course function as usual and open new web pages or send emails, but also load new panos and execute FPP commands in your XML file.
The following parameters are supported:

htmlfilehtmlfile="text1.html"file with HTML content
cssfilecssfile="styles1.css"file with CSS styling (optional)
charsetcharset="iso-8859-1"character set. For a complete list see here.
Default value is "utf-8"
 
widthwidth="250"
heightheight="400"
bgcolorbgcolor="#CCCCFF"RGB value, default: transparent
bordercolorbordercolor="#0000FF"RGB value, default: no border


NOTE:
Changes in the "htmlfile" or the "cssfile" parameters are immediately reflected in the box content.

The HTML supported by Adobe in the TextField class is very limited.
You can read about it here:
http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/text/TextField.html#htmlText