Actionscript2 Flash vars in AS2

When you specify Flash vars in the embed or object tag they become available to actionscript through _root property of the flash file when it loads.

Example html with flash vars :

<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
 codebase=""http://macromedia.com/cabs/swflash.cab#version=6,0,0,0""
 WIDTH="250" HEIGHT="250" id="flaMovie1" ALIGN="CENTER">
 <PARAM NAME=movie VALUE="flaMovie1.swf">
 <PARAM NAME=FlashVars VALUE="imageFilename=images%2Fimage1%2Ejpg"> 
 <PARAM NAME=quality VALUE=high> 
 <PARAM NAME=bgcolor VALUE=#FFFFFF> 
 <embed src="flaMovie1.swf" FlashVars="imageFilename=images%2Fimage1%2Ejpg" 
  quality="high" bgcolor="#FFFFFF" WIDTH="250" HEIGHT="250" 
  NAME="flaMovie1" ALIGN TYPE="application/x-shockwave-flash" 
  PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer">
</OBJECT>

Now in Actionscript you access it like so:

trace (_root.imageFilename);