var d = null, i = 0; style = null, result = null, note = null; 
 
d = app.documents.firstItem(); 
style = d.characterStyles.itemByName('Fußnote'); // hier den Namen für das Zeichenformat anpassen 
 
if (style.isValid) 
{ 
	app.findGrepPreferences = NothingEnum.nothing; 
	app.findGrepPreferences.appliedCharacterStyle = style; 
	result = d.findGrep(true); 
	app.findGrepPreferences = NothingEnum.nothing; 
 
	for ( i = 0; i < result.length; i++) 
	{ 
		if (result[i].parent == result[i].parentStory) 
		{ 
			note = result[i].parent.insertionPoints[result[i].characters.firstItem().index].footnotes.add(); 
			result[i].move(LocationOptions.AFTER, note.insertionPoints.lastItem()); 
		} 
	} 
} 
else 
	alert('Achtung!\nDas angegebene Zeichenformat existiert nicht.');