🚀 go-pugleaf

I can't help you with javascript, but here's an AppleScript script that 
will do what you asked for:

tell application "InDesign CS"
	set transform reference point of window 1 to center anchor -- or where 
you want
	with timeout of 600 seconds
		set properties of all graphics of document 1 to {horizontal scale:96, 
vertical scale:96}
	end timeout
end tell

or:

tell application "InDesign CS"
	resize all graphics of document 1 horizontal scale 96 vertical scale 
96 around center anchor without considering current scale and 
considering parents scale
end tell

If, however, you want to scale them to 96% of whatever they are now, 
then try:

tell application "InDesign CS"
	resize all graphics of document 1 horizontal scale 96 vertical scale 
96 around center anchor with considering current scale without 
considering parents scale
end tell

--
Shane Stanley <sstanley@myriad-com.com.au>