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<PARAM NAME=movie VALUE="index_"+ID+".swf">
<PARAM NAME=menu VALUE=false>
<PARAM NAME=quality VALUE=high>
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<EMBED src="index_"+ID+"..swf" menu=false quality=high bgcolor=#FFFFFF WIDTH="100%" HEIGHT="100%" NAME="index" ALIGN=""
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non fai altro che far far visualizzare il tutto con una rensponse.Write() e a ID associ inglese, italiano, crucco, etc etc e lui, andrà a caricarti i file index_inglese o index_italiano a seconda di come setti la variabile!
capito?